Calculators

Browse and search over 250 evidence-based medical calculators.

A

A-a GradientCalculates difference between alveolar and arterial oxygen concentration.

ABCD2 Score to Predict Stroke Risk after TIAEstimates the risk of stroke following transient ischemic attack.

Absolute Eosinophil CountAssesses number of eosinophils (e.g., in people with allergic or autoimmune conditions, or parasite infections).

Absolute Lymphocyte CountEstimates number of lymphocytes and predicts CD4 count.

Absolute Neutrophil CountMeasures number of neutrophils (used to asses neutropenia or neutrophilia).

Absolute Reticulocyte CountMeasures reticulocytes (used to assess anemia).

ACR/EULAR Rheumatoid Arthritis Diagnostic Criteria (2010) Diagnostic criteria for rheumatoid arthritis.

Acute Heart Failure Prediction Based on NT-proBNP and Clinical FeaturesEstimates risk of acute heart failure.

Alcohol Consumption Screening AUDIT QuestionnaireScreening tool to identify alcohol use disorders.

Aminoglycoside Clearance EstimateEstimates rate of aminoglycoside clearance.

Anion GapAids in identifying causes of metabolic acidosis.

Anion Gap Delta Delta Gradient MulticalcAids in identifying acid-base disorders.

Anion Gap Delta Delta Ratio MulticalcAids in identifying acid-base disorders.

Anion Gap in Hypoalbumin StatesCalculation of anion gap (to identify acid-base disorders) taking hypoalbuminemia into account.

APACHE II scoring systemEstimates ICU mortality.

Apgar scoreAssesses neonates 1 and 5 minutes after birth.

Arterial Blood Gas Interpretation TreeCalcAnalysis of arterial blood gas results.

Atrial Fibrillation CHA(2)DS(2)-VASc Score for Stroke RiskEstimates risk of stroke in patients with atrial fibrillation.

Atrial fibrillation CHADS(2) score for stroke riskEstimates risk of stroke in patients with atrial fibrillation.

B

BAP-65 prediction of in-hospital mortality and need for mechanical ventilation in COPDPredicts risk of mortality and need for mechanical ventilation in acute exacerbations of COPD.

Base Excess DeterminationAids in identifying acid-base disorders.

Bayesian Statistics I MultiCalcCalculates statistics from prevalence, sensitivity, and specificity.

Bayesian Statistics II MultiCalcCalculates statistics from true and false positives and negatives.

Bedside Index of Severity in Acute Pancreatitis (BISAP) ScorePredicts risk of mortality in acute pancreatitis.

Benefit Increase / Number Needed to Treat MulticalcCalculates absolute and relative benefit and number needed to treat.

Bicarbonate DeficitCalculates total bicarbonate deficit.

Blatchford score for gastrointestinal bleedingStratifies patients with upper GI bleed, identifying those who can be safely treated as outpatients.

Bleeding Risk (any bleeding complication) on Warfarin TherapyEstimates risk of any bleeding complications for patients on warfarin.

Bleeding Risk (major complication) on Warfarin TherapyEstimates risk of major bleeding complications for patients on warfarin.

Bleeding Risk Index for Warfarin TherapyEstimates risk of bleeding for patients on warfarin.

Blood Ethanol Concentration EstimationEstimates blood ethanol concentration.

Blood Pressure Percentiles for Boys (2 - 17 years)Assesses whether child has healthy blood pressure for their height, age, and gender.

Blood Pressure Percentiles for Girls (2 - 17 years)Assesses whether child has healthy blood pressure for their height, age, and gender.

BODE Index for COPD Survival PredictionEstimates prognosis in patients with COPD based on body mass index, airflow obstruction, dyspnea, and exercise.

Body Mass Index (BMI) percentiles for boys (2 to 20 years)Assesses whether patient is at a weight appropriate for their height, age, and gender.

Body Mass Index (BMI) percentiles for girls (2 to 20 years)Assesses whether patient is at a weight appropriate for their height, age, and gender.

Body Mass Index (Quetelet's index)Assesses whether patient is at a weight appropriate for their height.

Body Surface Area (Du Bois Method)Calculation of body surface area.

Body Surface Area (Gehan & George Method)Calculation of body surface area.

Body Surface Area (Mosteller, square root method)Calculation of body surface area.

Body Surface Area Based DosingCalculates drug dose based on body surface area.

Breast Cancer Recurrence Risk After Mastectomy (simple)Assesses risk of breast cancer recurrence after mastectomy based on tumor grade and lymphatic involvement.

Burn Injury Fluid Resuscitation (Brooke estimate)Estimates fluid requirements following burn injury.

Burn Injury Fluid Resuscitation (Demling dextran estimate)Estimates colloid fluid requirements following burn injury.

Burn Injury Fluid Resuscitation (Evans estimate)Estimates fluid requirements following burn injury.

Burn Injury Fluid Resuscitation (Modified Brooke crystalloid estimate)Estimates fluid requirements following burn injury.

Burn Injury Fluid Resuscitation (Slater estimate)Estimates fluid requirements following burn injury.

Burn Injury Fluid Resuscitation, Adult (Parkland crystalloid estimate)Often used to estimate fluid requirements in adults following major burn injury.

C

Calcium Correction in HypoalbuminemiaCalculates corrected calcium level for patients with hypoalbuminemia.

Calcium Correction in Hypoalbuminemia (SI units)Calculates corrected calcium level for patients with hypoalbuminemia.

Canadian Head CT Rule for Minor Head InjuryAssesses which patients with minor head injury need CT scan.

Cardiac outputCalculates cardiac output.

Cardiac Risk Index for Non-AAA Vascular Surgery (Lee)Estimates risk of cardiac complications following vascular surgery (non-abdominal aortic aneurysm).

Cardiac Risk Index for Orthopedic Surgery (Lee)Estimates risk of cardiac complications following orthopedic surgery.

Cardiac Risk Index in Noncardiac Surgery (Detsky et. al.)Estimates risk of cardiac complications following noncardiac surgery.

Cardiac Risk Index in Noncardiac Surgery (Goldman, et. al.)Estimates risk of cardiac complications following noncardiac surgery.

Cardiovascular Risk Assessment (10-year, ACC/AHA 2013)Estimates 10-year risk of cardiovascular disease based on key risk factors.

Cardiovascular risk assessment (10-year, MESA 2015, with or without CAC score)Ten-year cardiovascular risk assessment with or without coronary artery calcification score.

Cardiovascular Risk Assessment (10-year, PROCAM Score, Munster Heart Study SI units)Ten-year cardiovascular risk score based on Munster study with cholesterol levels in SI units.

Cardiovascular Risk Assessment (10-year, PROCAM Score, Munster Heart Study)Ten-year cardiovascular risk score based on Munster study with cholesterol levels in mg/dL.

Cardiovascular Risk Assessment in Men (10-year, patient information, Framingham 2008)Cardiovascular risk score that includes patient information for men.

Cardiovascular Risk Assessment in Men (10-year, Reynolds Risk Score 2008)Ten-year cardiovascular risk score that includes C-reactive protein as well as other criteria.

Cardiovascular Risk Assessment in Type I Diabetes (5-year)Estimates 5-year risk of cardiovascular disease in patients with type I diabetes.

Cardiovascular Risk Assessment in Women (10-year, patient information, Framingham 2008)Cardiovascular risk score that includes patient information for women.

CDC height for age percentiles for boys (2 to 20 years)Assesses whether patient is at appropriate height for their age.

CDC height for age percentiles for girls (2 to 20 years)Assesses whether patient is at appropriate height for their age.

CDC/NCHS Infant Head Circumference for Age Percentiles (<36 months)Assesses whether patient has appropriate head circumference for their age.

Child Pugh classification for severity of liver diseaseAssesses severity of liver disease.

Child Pugh classification for severity of liver disease (SI units)Assesses severity of liver disease.

CIWA-Ar Clinical Institute Withdrawal Assessment for Alcohol scaleAssesses severity of alcohol withdrawal and helps guide management.

Clinical Grading to Predict Malignant HyperthermiaHistorical, clinical and laboratory features to assess malignant hyperthermia.

Clinical Pulmonary Infection Score (CPIS)Aids in early diagnosis and treatment of ventilator-associated pneumonia.

Cognitive Impairment Screening with 6 QuestionsScreening tool for cognitive impairment in adults.

Community-acquired pneumonia severity index (PSI) for adultsEstimates risk of mortality in patients with community-acquired pneumonia.

Conventional unit to SI unit conversions: Chemistry testsUnit conversions for chemistries.

Conventional unit to SI unit conversions: Immunology test valuesUnit conversions for immunology tests.

Creatinine clearance (measured)Measures creatinine clearance.

Creatinine clearance estimate by Cockcroft-Gault equationCalculates creatinine clearance according to the Cockcroft-Gault equation.

Creatinine clearance estimate by Cockcroft-Gault equation (SI units)Calculates creatinine clearance according to the Cockcroft-Gault equation.

Crohn's Disease Activity Index (CDAI)Assesses severity of Crohn disease.

CURB-65 pneumonia severity scorePredicts risk of mortality in community-acquired pneumonia.

D

Depression (any) Screening by a Two Item PHQ-2Scores for likelihood of any depression.

Depression (major) Screening by a Two Item PHQ-2Scores for likelihood of major depression.

E

Endocarditis Diagnostic Criteria -- Duke CriteriaPathological and major/minor clinical criteria for endocarditis.

Endocarditis Diagnostic Criteria -- Modified Duke CriteriaUpdated clinicopathological criteria for endocarditis.

Epworth Sleepiness Scale (ESS)Measures daytime sleepiness.

Estimated Date of Delivery (EDD)Calculates gestational age and estimated date of delivery.

Estimated date of delivery (EDD) (Patient education)Calculates gestational age and estimated date of delivery.

EuroSCORE for Cardiac Surgery Risk Assessment (additive version)Calculates risk of mortality in patients undergoing cardiac surgery.

F

Fall Risk in Elderly Hospitalized PatientsEstimates risk of fall in elderly patients.

Fractional Excretion of MagnesiumCalculates fractional excretion of magnesium (used to assess hypomagnesemia).

Fractional Excretion of Magnesium (SI units)Calculates fractional excretion of magnesium (used to assess hypomagnesemia).

Fractional Excretion of SodiumCalculates fractional excretion of sodium, helping to assess acute kidney injury.

Fractional Excretion of Sodium (SI units)Calculates fractional excretion of sodium, helping to assess acute kidney injury.

Fracture Index WITH known Bone Mineral Density (BMD)Calculates risk of fracture based on factors including bone mineral density.

Fracture Index WITHOUT known Bone Mineral Density (BMD)Calculates risk of fracture based on factors not including bone mineral density.

Friedewald Equation for Low Density Lipoprotein (LDL-C)Estimates concentration of LDL-C in plasma.

Friedewald Equation for Low Density Lipoprotein (LDL-C, SI units)Estimates concentration of LDL-C in plasma.

Functional Residual CapacityCalculates functional residual capacity from sum of expiratory reserve and residual volume.

G

Gail Model for 5 Year Risk of Breast Cancer (1999 paper)Estimates 5-year risk of breast cancer based on key risk factors.

Gail Model for 5 Year Risk of Breast Cancer in Black Women (2007)Estimates 5-year risk of breast cancer in black women.

Geriatric Depression 1 Item ScreenerAssesses likelihood of depression in elderly patients, based on 1 question.

Geriatric Depression 4 Item ScaleAssesses likelihood of depression in elderly patients, based on 4 questions.

Geriatric Depression ScaleAssesses likelihood of depression in elderly patients.

Gestational Age from Estimated Date of Delivery (EDD)Calculates gestational age based on estimated date of delivery.

Glasgow Alcoholic Hepatitis ScoreEstimates mortality risk in patients with alcoholic hepatitis.

Glasgow Blatchford Score for Gastrointestinal BleedingStratifies patients with upper GI bleed, identifying those who can be safely treated as outpatients.

Glasgow Coma ScaleAssessment of conscious level based on eye, verbal, and motor responses to stimuli.

Glomerular Filtration Rate Estimate by CKD-EPI EquationEstimates glomerular filtration rate based on creatinine and patient characteristics.

Glomerular Filtration Rate Estimate by Quadratic EquationEstimates glomerular filtration rate based on creatinine and patient's age and gender.

Glomerular Filtration Rate Estimate by Schwartz FormulaEstimates glomerular filtration rate in children based on creatinine and patient's height.

Glomerular Filtration Rate Estimate by the Abbreviated MDRD Study EquationEstimates glomerular filtration rate based on creatinine and patient characteristics.

Glomerular Filtration Rate Estimate by the Abbreviated MDRD Study Equation (SI units)Estimates glomerular filtration rate based on creatinine and patient characteristics.

Glomerular Filtration Rate Estimate by the IDMS-Traceable MDRD Study EquationEstimates glomerular filtration rate based on creatinine and patient characteristics.

Glomerular Filtration Rate Estimate by the MDRD EquationEstimates glomerular filtration rate based on creatinine and patient characteristics.

Glomerular Filtration Rate Estimate by the MDRD Equation (SI units)Estimates glomerular filtration rate based on creatinine and patient characteristics.

Glomerular Filtration Rate Estimate by Updated Schwartz FormulaEstimates glomerular filtration rate in children based on creatinine and patient's height.

Glomerular Filtration Rate Estimate in African Americans by AASK EquationEstimates glomerular filtration rate based on creatinine and patient's age and gender.

GRACE Score for Acute Coronary Syndrome PrognosisEstimates mortality risk for patients with acute coronary syndrome.

H

Harvey-Bradshaw Index of Crohn's Disease ActivityAssessment of Crohn's disease activity including extraintestinal features.

HAS-BLED Bleeding Risk ScoreEstimates risk of major bleeding for patients with atrial fibrillation on oral anticoagulation.

Heart Failure DiagnosisClinical criteria for diagnosis of heart failure.

HEART ScoreIncorporates elements of the patient's history, ECG, age, risk factors, and troponin and is used for patients in the accident and emergency department setting to assess risk of acute MI, PCI, CABG, and death within 6 weeks of initial presentation

Hepatitis C Outcome TreeCalcAssesses risk of death, hepatocellular carcinoma, or liver transplantation in patients with hepatitis C.

Hepatitis Discriminant Function for Corticosteroid Therapy in Alcoholic HepatitisScore parameters including prothrombin time and bilirubin level.

HOMA Formula: Homeostasis Model Assessment of Insulin ResistanceEstimates severity of insulin resistance.

I

Injury Severity Score (ISS)Assesses severity of traumatic injury.

International Prognostic Index for Non-Hodgkin LymphomaPrognostic score including age and stage.

International Prognostic Score in Hodgkin LymphomaEstimates freedom from progression and overall survival in patients with Hodgkin lymphoma.

International Prognostic Score in Hodgkin Lymphoma (2012 update)Prognostic score including stage and laboratory features.

Intracranial Bleeding Risk from Thrombolytic Therapy of MIEstimates risk of cerebral bleeding in patients treated with thrombolytic therapy for mycocardial infarction.

Irritable Bowel Syndrome Diagnostic Criteria (Manning Criteria)Diagnostic criteria for irritable bowel syndrome.

J

Jones Criteria for Diagnosis of Rheumatic FeverDiagnostic criteria for rheumatic fever.

K

Karnofsky Performance Status ScoreAssesses patient for functional impairment.

Kawasaki Disease Diagnostic CriteriaDiagnostic criteria for Kawasaki disease.

Kidney Failure Risk (5-year)Estimates risk of kidney failure.

Kt/V Dialysis Dose Daugirdas FormulaQuantifies adequacy of dialysis treatment.

L

LACE Score Predicting Readmission or Post Hospitalization DeathPredicts 30-day readmission or death.

Likelihood Ratio MultiCalcEstimates how much a test result will change the odds of having a disease.

Low anterior resection syndrome (LARS) scoreSymptom-based scoring system for bowel dysfunction after low anterior resection (LAR) for rectal cancer.

M

Maintenance Fluid Calculation for ChildrenCalculates maintenance fluid requirements by weight.

Mangled Extremity Severity Score (MESS score)Estimates viability of an extremity after trauma.

Mantle Cell Lymphoma International Prognostic Index (MIPI)Estimates prognosis in mantle cell lymphoma.

Mayo score for assessing ulcerative colitis activityAssesses severity of ulcerative colitis.

MDACC Myelodysplastic Syndrome Prognostic ModelA prognostic scoring system for myelodysplastic syndrome.

MELD Score for End-Stage Liver Disease (NOT appropriate for patients under the age of 12)Quantifies end-stage liver disease for transplant planning.

MELD Score for End-Stage Liver Disease (NOT appropriate for patients under the age of 12) (SI units)Quantifies end-stage liver disease for transplant planning.

MELDNa Score (2008) for End-Stage Liver Disease (NOT appropriate for patients under the age of 12)Adds sodium to the MELD model for liver cirrhosis.

MELDNa Score (2008) for End-Stage Liver Disease (NOT appropriate for patients under the age of 12) (SI units)Adds sodium to the MELD model for liver cirrhosis.

MELDNa Score (2016)Quantifies end-stage liver disease.

MELDNa Score (2016) (SI units)Quantifies end-stage liver disease.

Metabolic Syndrome Criteria (AACE 2003)American Association of Clinical Endocrinologists calculator for metabolic syndrome.

Metabolic Syndrome Criteria (AHA/NHLBI 2005)American Heart Association/National Heart, Lung and Blood Institute calculator for metabolic syndrome.

Metabolic Syndrome Criteria (EGIR)European Group for the Study of Insulin Resistance calculator for metabolic syndrome.

Metabolic Syndrome Criteria (IDF 2005)International Diabetes Federation calculator for metabolic syndrome.

Migraine ScreenerScores likelihood of migraine.

Migraine With Aura Diagnostic CriteriaCriteria for migraine with aura.

Migraine Without Aura Diagnostic CriteriaCriteria for migraine without aura.

Modified Maddrey's Discriminant FunctionSuggests which patients with alcoholic hepatitis may benefit from corticosteroids.

Modified Wells score for deep vein thrombosis (DVT)Calculates risk of DVT.

MODS Score: Multiple Organ DysfunctionPredicts hospital/ICU mortality and ICU length of stay based on measures of multiple organ dysfunction.

Multinational Association for Supportive Care in Cancer (MASCC) risk index for patients with neutropenic feverRisk index for people with neutropenic fever.

Myelodysplastic Syndrome International Prognostic Scoring SystemPrognostic assessment for myelodysplastic syndrome.

N

NAFLD Fibrosis ScoreUtilises age, hyperglycaemia, BMI, platelet count, albumin, and AST:ALT ratio (AAR) to predict patients with advanced liver fibrosis.

Negative Predictive Value of a TestProbability with a negative screening test of not having the disease.

New Orleans Head CT CriteriaCriteria for head CT after head trauma.

Newborn Hyperbilirubinemia AssessmentAssessment including infant age, bilirubin level, and clinical risk group.

NIH Stroke ScoreQuantifies stroke severity based on multiple neurologic factors.

Norton Scale to Stratify Risk of Pressure SoresAssessment scale for risk of pressure ulcers.

O

Odds Ratio and Relative RiskCalculates odds ratio and relative risk.

Osmolal Gap CalculatorCalculates osmolal gap to detect unmeasured compounds in serum.

Osmolal Gap Calculator (SI units)Calculates osmolal gap to detect unmeasured compounds in serum (SI units).

Osmolality Estimator (serum)Estimates serum osmolality with sodium, glucose and BUN.

Osmolar ClearanceCalculates renal osmolar clearance using urine/serum Osm and urine volume per day.

Osteoporosis Risk Assessment by Composite Linear Estimate (ORACLE score)Osteoporosis risk assessment score (age, BMI, hormone replacement, fracture history, ultrasound bone profile index).

Osteoporosis Risk Assessment Index (ORAI)Osteoporosis risk assessment index (age, body weight).

Osteoporosis Risk SCORE (Simple Calculated Osteoporosis Risk Estimation)Osteoporosis risk assessment score (ancestry, rheumatoid arthritis, fracture history, age, hormone replacement, weight).

Oswestry Disability Index Version 1Disability index for low back pain based on questions in 10 areas of function.

Oswestry Disability Index Version 2Disability index for low back pain based on questions in 10 areas of function.

Ottawa Ankle Rule for the Use of X-Ray in Ankle InjuryDescribes criteria for ankle trauma patients to determine need for imaging.

Ottawa Foot Rule for the Use of X-Ray in Foot InjuryDescribes criteria for foot trauma patients to determine need for imaging.

Ottawa Knee Rule for use of X Ray in Knee InjuryDescribes criteria for knee trauma patients to determine need for imaging.

P

Padua Score for Assessing Venous Thromboembolism Risk in Hospitalized PatientsDetermines need for VTE prophylaxis in hospitalized patients.

Palliative Prognostic Score in Terminal Illness30-day probability of survival in terminal illness.

Pancreatitis Prognosis CriteriaMortality scale for acute pancreatitis, based on criteria from admission to day 2 of hospitalization.

Pancreatitis Prognosis Criteria When Disease Due To GallstonesMortality scale for gallstone-related acute pancreatitis, based on criteria from admission to day 2 of hospitalization.

Panic Disorder ScreenerLikelihood of panic disorder based on features over last 6 months.

PASI Psoriasis Area and Severity IndexSeverity index for psoriasis based on surface area, erythema, induration, desquamation.

Peak Expiratory Flow PredictionPredicts peak expiratory flow based on height and age.

PELD Score for End-Stage Liver Disease (patients less than 12 years old)Calculates the pediatric version of the MELD score for liver cirrhosis severity and transplant planning.

PERC Rule for the Assessment of Possible Pulmonary EmbolismRules out PE if no criteria are present and pre-test probability is less than or equal to 15%.

Pneumothorax Degree of CollapseCalculates pneumothorax volume (%) using lung and hemithorax diameters.

Polycythemia Vera Diagnostic CriteriaCriteria for polycythemia vera including splenomegaly and laboratory features.

Positive Predictive Value of a TestProbability with a positive screening test of having the disease.

Post Test Probability from Pre Test Probability, Sensitivity and SpecificityPost-test probability calculator for having a disease.

Post-Test Probability from Likelihood Ratios and Multiple Test ResultsPost-test probability calculator for having a disease.

Predicted postoperative FEV1 following lung resection surgery (anatomic method)Predicted postoperative FEV1 after lung resection using lung anatomy.

Predicted postoperative FEV1 following lung resection surgery (perfusion method)Predicted postoperative FEV1 after lung resection using perfusion scan.

Pretest Probability of Heparin Induced Thrombocytopenia (4-T's score)Assesses the risk for heparin-induced thrombocytopenia.

Prostatism Symptom ScoreScores symptoms of prostatism (minimal, moderate, severe).

Pulmonary Embolism Risk by Pisa Study (with chest x-ray)Risk score for pulmonary embolism (age, gender, risk factors) including chest x-ray.

Pulmonary Embolism Risk by Pisa Study (without chest x-ray)Risk score for pulmonary embolism (age, gender, risk factors) excluding chest x-ray.

Pulmonary Embolism Severity Index (PESI)Stratifies severity of pulmonary embolism from very low to very high risk.

Pulmonary Embolism Wells ScoreCalculates probability of pulmonary embolism.

Q

QT Interval Correction (EKG)Corrects QT interval for heart rate.

R

Residual Renal Function in Hemodialysis Patients (Kru)Residual kidney function for people receiving hemodialysis.

Rheumatoid arthritis Clinical Disease Activity Index (CDAI)Disease activity scoring system for rheumatoid arthritis.

Rheumatoid arthritis Disease Activity Score with C-reactive protein (DAS28-CRP)Determines severity of rheumatoid arthritis using clinical data and CRP.

Rheumatoid arthritis Disease Activity Score with Erythrocyte Sedimentation Rate (DAS28-ESR)Determines severity of rheumatoid arthritis using clinical data and ESR.

Rheumatoid arthritis Simplified Disease Activity Index (SDAI)Determines severity of rheumatoid arthritis using clinical and laboratory data.

Right to Left Shunt Fraction Qs/QtRight to left shunt fraction (Qs/Qt) calculator using temperature, altitude, paCO2 and paO2.

Risk Reduction / Number Needed to Treat MulticalcCalculates risk reduction/number needed to treat.

Rockall Score for Upper Gastrointestinal BleedingDetermines severity of GI bleeding.

Roland-Morris Disability ScoreScoring for physical disability caused by low back pain.

Rotator Cuff Tear DiagnosisProbability of rotator cuff tear based on physical findings.

S

Sequential Organ Failure Assessment (Quick): qSOFA ScoreBedside clinical assessment to detect risk of deterioration due to sepsis.

Sequential Organ Failure Assessment: SOFA ScorePredicts ICU mortality using clinical and laboratory data.

SI Unit Conversions: Body Fluid ChemistriesSI unit conversions for multiple body fluid chemistries.

SI unit to conventional unit conversions: Chemistry and endocrine testsSI unit conversions for chemistries and endocrine tests.

SI unit to conventional unit conversions: Immunology test valuesUnit conversions for immunology tests.

Simplified Pulmonary Embolism Severity Index (sPESI)Risk stratifies patients with PE and can help identify those suitable for outpatient management.

Sodium Correction in Hyperglycemia (Hillier 1999)Determines if true hyponatremia is present in a patient with hyperglycemia.

Sore Throat (Pharyngitis) Evaluation and Treatment Criteria (McIsaac)Scoring system for sore throat including clinical features such as age, fever, lymphadenopathy or exudate.

Standard Drink EquivalentsAlcohol drink equivalents.

Stool Osmolal GapDetermines if chronic diarrhea is osmotic or secretory.

Stroke Risk in Diabetes Type 2 UKPDS 60Models chance of a first stroke in type 2 diabetes using risk factors.

Stroke Risk in Female Patients 55-84 Years Old (Framingham data)Stroke risk for women.

Stroke Risk in Male Patients 55-84 Years Old (Framingham data)Stroke risk for men.

Systemic Vascular ResistanceCalculates systemic vascular resistance using cardiologic parameters.

T

Temperature Unit ConversionsTemperature converter: Celsius, Fahrenheit, Kelvin.

Thrombolysis in Myocardial Infarction (TIMI) Score for ST Elevation Acute Myocardial InfarctionEstimates mortality in patients with STEMI.

Thrombolysis in Myocardial Infarction (TIMI) Score for Unstable Angina Non ST Elevation Myocardial InfarctionEstimates mortality in patients with unstable angina or NSTEMI.

TIA Prognosis: Risk of Stroke by 90 Days After PresentationApproximate 90-day risk of stroke following TIA.

U

Urine anion gapAids in identifying causes of metabolic acidosis where there is no serum anion gap.

V

Venous Leg Ulcer Healing PredictionScore for venous leg ulcer healing in 24 weeks based on duration and area.

W

Water Deficit in HypernatremiaCalculates free water deficit in hypernatremia.

Weight Unit ConversionsInternational weight conversions.

WHO Assessment of Malnutrition in Boys 2 to 5 years OldWHO score for malnutrition based on age, height and weight.

WHO Assessment of Malnutrition in Girls 2 to 5 years OldWHO score for malnutrition based on age, height and weight.

WHO infant head circumference for age percentiles (<24 months)WHO head circumference percentiles birth to 24 months.

WHO Infant Length for Age Percentiles (<24 months)WHO growth chart: length for age percentiles birth to 24 months.

WHO Infant Weight for Age Percentiles (<24 months)WHO growth chart: weight for age percentiles birth to 24 months.

WHO infant weight for length percentiles (<24 months)WHO growth chart: weight for length percentiles birth to 24 months.

Cardiac outputCalculates cardiac output.

Cardiac Risk Index for Non-AAA Vascular Surgery (Lee)Estimates risk of cardiac complications following vascular surgery (non-abdominal aortic aneurysm).

Cardiac Risk Index for Orthopedic Surgery (Lee)Estimates risk of cardiac complications following orthopedic surgery.

Cardiac Risk Index in Noncardiac Surgery (Detsky et. al.)Estimates risk of cardiac complications following noncardiac surgery.

Cardiac Risk Index in Noncardiac Surgery (Goldman, et. al.)Estimates risk of cardiac complications following noncardiac surgery.

EuroSCORE for Cardiac Surgery Risk Assessment (additive version)Calculates risk of mortality in patients undergoing cardiac surgery.

Right to Left Shunt Fraction Qs/QtRight to left shunt fraction (Qs/Qt) calculator using temperature, altitude, paCO2 and paO2.

Systemic Vascular ResistanceCalculates systemic vascular resistance using cardiologic parameters.

Blood Pressure Percentiles for Boys (2 - 17 years)Assesses whether child has healthy blood pressure for their height, age, and gender.

Blood Pressure Percentiles for Girls (2 - 17 years)Assesses whether child has healthy blood pressure for their height, age, and gender.

Body Mass Index (BMI) percentiles for boys (2 to 20 years)Assesses whether patient is at a weight appropriate for their height, age, and gender.

Body Mass Index (BMI) percentiles for girls (2 to 20 years)Assesses whether patient is at a weight appropriate for their height, age, and gender.

Body Mass Index (Quetelet's index)Assesses whether patient is at a weight appropriate for their height.

Body Surface Area (Du Bois Method)Calculation of body surface area.

Body Surface Area (Mosteller, square root method)Calculation of body surface area.

Body Surface Area Based DosingCalculates drug dose based on body surface area.

CDC height for age percentiles for boys (2 to 20 years)Assesses whether patient is at appropriate height for their age.

CDC height for age percentiles for girls (2 to 20 years)Assesses whether patient is at appropriate height for their age.

CDC/NCHS Infant Head Circumference for Age Percentiles (<36 months)Assesses whether patient has appropriate head circumference for their age.

WHO Assessment of Malnutrition in Boys 2 to 5 years OldWHO score for malnutrition based on age, height and weight.

WHO Assessment of Malnutrition in Girls 2 to 5 years OldWHO score for malnutrition based on age, height and weight.

WHO infant head circumference for age percentiles (<24 months)WHO head circumference percentiles birth to 24 months.

WHO Infant Length for Age Percentiles (<24 months)WHO growth chart: length for age percentiles birth to 24 months.

WHO Infant Weight for Age Percentiles (<24 months)WHO growth chart: weight for age percentiles birth to 24 months.

WHO infant weight for length percentiles (<24 months)WHO growth chart: weight for length percentiles birth to 24 months.

Acute Heart Failure Prediction Based on NT-proBNP and Clinical FeaturesEstimates risk of acute heart failure.

Atrial Fibrillation CHA(2)DS(2)-VASc Score for Stroke RiskEstimates risk of stroke in patients with atrial fibrillation.

Atrial fibrillation CHADS(2) score for stroke riskEstimates risk of stroke in patients with atrial fibrillation.

Blood Pressure Percentiles for Boys (2 - 17 years)Assesses whether child has healthy blood pressure for their height, age, and gender.

Blood Pressure Percentiles for Girls (2 - 17 years)Assesses whether child has healthy blood pressure for their height, age, and gender.

Cardiac outputCalculates cardiac output.

Cardiac Risk Index for Non-AAA Vascular Surgery (Lee)Estimates risk of cardiac complications following vascular surgery (non-abdominal aortic aneurysm).

Cardiac Risk Index for Orthopedic Surgery (Lee)Estimates risk of cardiac complications following orthopedic surgery.

Cardiac Risk Index in Noncardiac Surgery (Detsky et. al.)Estimates risk of cardiac complications following noncardiac surgery.

Cardiac Risk Index in Noncardiac Surgery (Goldman, et. al.)Estimates risk of cardiac complications following noncardiac surgery.

Cardiovascular Risk Assessment (10-year, ACC/AHA 2013)Estimates 10-year risk of cardiovascular disease based on key risk factors.

Cardiovascular risk assessment (10-year, MESA 2015, with or without CAC score)Ten-year cardiovascular risk assessment with or without coronary artery calcification score.

Cardiovascular Risk Assessment (10-year, PROCAM Score, Munster Heart Study SI units)Ten-year cardiovascular risk score based on Munster study with cholesterol levels in SI units.

Cardiovascular Risk Assessment (10-year, PROCAM Score, Munster Heart Study)Ten-year cardiovascular risk score based on Munster study with cholesterol levels in mg/dL.

Cardiovascular Risk Assessment in Men (10-year, patient information, Framingham 2008)Cardiovascular risk score that includes patient information for men.

Cardiovascular Risk Assessment in Men (10-year, Reynolds Risk Score 2008)Ten-year cardiovascular risk score that includes C-reactive protein as well as other criteria.

Cardiovascular Risk Assessment in Type I Diabetes (5-year)Estimates 5-year risk of cardiovascular disease in patients with type I diabetes.

Cardiovascular Risk Assessment in Women (10-year, patient information, Framingham 2008)Cardiovascular risk score that includes patient information for women.

Endocarditis Diagnostic Criteria -- Duke CriteriaPathological and major/minor clinical criteria for endocarditis.

Endocarditis Diagnostic Criteria -- Modified Duke CriteriaUpdated clinicopathological criteria for endocarditis.

EuroSCORE for Cardiac Surgery Risk Assessment (additive version)Calculates risk of mortality in patients undergoing cardiac surgery.

Friedewald Equation for Low Density Lipoprotein (LDL-C)Estimates concentration of LDL-C in plasma.

Friedewald Equation for Low Density Lipoprotein (LDL-C, SI units)Estimates concentration of LDL-C in plasma.

GRACE Score for Acute Coronary Syndrome PrognosisEstimates mortality risk for patients with acute coronary syndrome.

Heart Failure DiagnosisClinical criteria for diagnosis of heart failure.

Intracranial Bleeding Risk from Thrombolytic Therapy of MIEstimates risk of cerebral bleeding in patients treated with thrombolytic therapy for mycocardial infarction.

Jones Criteria for Diagnosis of Rheumatic FeverDiagnostic criteria for rheumatic fever.

Kawasaki Disease Diagnostic CriteriaDiagnostic criteria for Kawasaki disease.

Metabolic Syndrome Criteria (AACE 2003)American Association of Clinical Endocrinologists calculator for metabolic syndrome.

Metabolic Syndrome Criteria (AHA/NHLBI 2005)American Heart Association/National Heart, Lung and Blood Institute calculator for metabolic syndrome.

Metabolic Syndrome Criteria (EGIR)European Group for the Study of Insulin Resistance calculator for metabolic syndrome.

Metabolic Syndrome Criteria (IDF 2005)International Diabetes Federation calculator for metabolic syndrome.

Padua Score for Assessing Venous Thromboembolism Risk in Hospitalized PatientsDetermines need for VTE prophylaxis in hospitalized patients.

Panic Disorder ScreenerLikelihood of panic disorder based on features over last 6 months.

QT Interval Correction (EKG)Corrects QT interval for heart rate.

Right to Left Shunt Fraction Qs/QtRight to left shunt fraction (Qs/Qt) calculator using temperature, altitude, paCO2 and paO2.

Sequential Organ Failure Assessment: SOFA ScorePredicts ICU mortality using clinical and laboratory data.

Simplified Pulmonary Embolism Severity Index (sPESI)Risk stratifies patients with PE and can help identify those suitable for outpatient management.

Stroke Risk in Female Patients 55-84 Years Old (Framingham data)Stroke risk for women.

Stroke Risk in Male Patients 55-84 Years Old (Framingham data)Stroke risk for men.

Systemic Vascular ResistanceCalculates systemic vascular resistance using cardiologic parameters.

Thrombolysis in Myocardial Infarction (TIMI) Score for ST Elevation Acute Myocardial InfarctionEstimates mortality in patients with STEMI.

Thrombolysis in Myocardial Infarction (TIMI) Score for Unstable Angina Non ST Elevation Myocardial InfarctionEstimates mortality in patients with unstable angina or NSTEMI.

A-a GradientCalculates difference between alveolar and arterial oxygen concentration.

APACHE II scoring systemEstimates ICU mortality.

BAP-65 prediction of in-hospital mortality and need for mechanical ventilation in COPDPredicts risk of mortality and need for mechanical ventilation in acute exacerbations of COPD.

Base Excess DeterminationAids in identifying acid-base disorders.

Bedside Index of Severity in Acute Pancreatitis (BISAP) ScorePredicts risk of mortality in acute pancreatitis.

Blatchford score for gastrointestinal bleedingStratifies patients with upper GI bleed, identifying those who can be safely treated as outpatients.

Blood Ethanol Concentration EstimationEstimates blood ethanol concentration.

BODE Index for COPD Survival PredictionEstimates prognosis in patients with COPD based on body mass index, airflow obstruction, dyspnea, and exercise.

Cardiac outputCalculates cardiac output.

Clinical Grading to Predict Malignant HyperthermiaHistorical, clinical and laboratory features to assess malignant hyperthermia.

Clinical Pulmonary Infection Score (CPIS)Aids in early diagnosis and treatment of ventilator-associated pneumonia.

CURB-65 pneumonia severity scorePredicts risk of mortality in community-acquired pneumonia.

EuroSCORE for Cardiac Surgery Risk Assessment (additive version)Calculates risk of mortality in patients undergoing cardiac surgery.

Glasgow Alcoholic Hepatitis ScoreEstimates mortality risk in patients with alcoholic hepatitis.

Glasgow Blatchford Score for Gastrointestinal BleedingStratifies patients with upper GI bleed, identifying those who can be safely treated as outpatients.

Glomerular Filtration Rate Estimate by Quadratic EquationEstimates glomerular filtration rate based on creatinine and patient's age and gender.

GRACE Score for Acute Coronary Syndrome PrognosisEstimates mortality risk for patients with acute coronary syndrome.

Heart Failure DiagnosisClinical criteria for diagnosis of heart failure.

Injury Severity Score (ISS)Assesses severity of traumatic injury.

Intracranial Bleeding Risk from Thrombolytic Therapy of MIEstimates risk of cerebral bleeding in patients treated with thrombolytic therapy for mycocardial infarction.

Maintenance Fluid Calculation for ChildrenCalculates maintenance fluid requirements by weight.

Mangled Extremity Severity Score (MESS score)Estimates viability of an extremity after trauma.

MODS Score: Multiple Organ DysfunctionPredicts hospital/ICU mortality and ICU length of stay based on measures of multiple organ dysfunction.

NIH Stroke ScoreQuantifies stroke severity based on multiple neurologic factors.

Palliative Prognostic Score in Terminal Illness30-day probability of survival in terminal illness.

Pancreatitis Prognosis CriteriaMortality scale for acute pancreatitis, based on criteria from admission to day 2 of hospitalization.

Pancreatitis Prognosis Criteria When Disease Due To GallstonesMortality scale for gallstone-related acute pancreatitis, based on criteria from admission to day 2 of hospitalization.

PELD Score for End-Stage Liver Disease (patients less than 12 years old)Calculates the pediatric version of the MELD score for liver cirrhosis severity and transplant planning.

Pneumothorax Degree of CollapseCalculates pneumothorax volume (%) using lung and hemithorax diameters.

Pulmonary Embolism Risk by Pisa Study (with chest x-ray)Risk score for pulmonary embolism (age, gender, risk factors) including chest x-ray.

Pulmonary Embolism Risk by Pisa Study (without chest x-ray)Risk score for pulmonary embolism (age, gender, risk factors) excluding chest x-ray.

Pulmonary Embolism Severity Index (PESI)Stratifies severity of pulmonary embolism from very low to very high risk.

Pulmonary Embolism Wells ScoreCalculates probability of pulmonary embolism.

Right to Left Shunt Fraction Qs/QtRight to left shunt fraction (Qs/Qt) calculator using temperature, altitude, paCO2 and paO2.

Rockall Score for Upper Gastrointestinal BleedingDetermines severity of GI bleeding.

Sequential Organ Failure Assessment (Quick): qSOFA ScoreBedside clinical assessment to detect risk of deterioration due to sepsis.

Sequential Organ Failure Assessment: SOFA ScorePredicts ICU mortality using clinical and laboratory data.

Simplified Pulmonary Embolism Severity Index (sPESI)Risk stratifies patients with PE and can help identify those suitable for outpatient management.

Sodium Correction in Hyperglycemia (Hillier 1999)Determines if true hyponatremia is present in a patient with hyperglycemia.

Thrombolysis in Myocardial Infarction (TIMI) Score for ST Elevation Acute Myocardial InfarctionEstimates mortality in patients with STEMI.

Thrombolysis in Myocardial Infarction (TIMI) Score for Unstable Angina Non ST Elevation Myocardial InfarctionEstimates mortality in patients with unstable angina or NSTEMI.

Kawasaki Disease Diagnostic CriteriaDiagnostic criteria for Kawasaki disease.

Norton Scale to Stratify Risk of Pressure SoresAssessment scale for risk of pressure ulcers.

PASI Psoriasis Area and Severity IndexSeverity index for psoriasis based on surface area, erythema, induration, desquamation.

ABCD2 Score to Predict Stroke Risk after TIAEstimates the risk of stroke following transient ischemic attack.

Acute Heart Failure Prediction Based on NT-proBNP and Clinical FeaturesEstimates risk of acute heart failure.

Anion GapAids in identifying causes of metabolic acidosis.

Anion Gap Delta Delta Gradient MulticalcAids in identifying acid-base disorders.

Anion Gap Delta Delta Ratio MulticalcAids in identifying acid-base disorders.

BAP-65 prediction of in-hospital mortality and need for mechanical ventilation in COPDPredicts risk of mortality and need for mechanical ventilation in acute exacerbations of COPD.

Blood Ethanol Concentration EstimationEstimates blood ethanol concentration.

Burn Injury Fluid Resuscitation (Brooke estimate)Estimates fluid requirements following burn injury.

Burn Injury Fluid Resuscitation (Demling dextran estimate)Estimates colloid fluid requirements following burn injury.

Burn Injury Fluid Resuscitation (Evans estimate)Estimates fluid requirements following burn injury.

Burn Injury Fluid Resuscitation (Modified Brooke crystalloid estimate)Estimates fluid requirements following burn injury.

Burn Injury Fluid Resuscitation (Slater estimate)Estimates fluid requirements following burn injury.

Burn Injury Fluid Resuscitation, Adult (Parkland crystalloid estimate)Often used to estimate fluid requirements in adults following major burn injury.

Canadian Head CT Rule for Minor Head InjuryAssesses which patients with minor head injury need CT scan.

CIWA-Ar Clinical Institute Withdrawal Assessment for Alcohol scaleAssesses severity of alcohol withdrawal and helps guide management.

Clinical Grading to Predict Malignant HyperthermiaHistorical, clinical and laboratory features to assess malignant hyperthermia.

Community-acquired pneumonia severity index (PSI) for adultsEstimates risk of mortality in patients with community-acquired pneumonia.

CURB-65 pneumonia severity scorePredicts risk of mortality in community-acquired pneumonia.

Glasgow Blatchford Score for Gastrointestinal BleedingStratifies patients with upper GI bleed, identifying those who can be safely treated as outpatients.

Heart Failure DiagnosisClinical criteria for diagnosis of heart failure.

Intracranial Bleeding Risk from Thrombolytic Therapy of MIEstimates risk of cerebral bleeding in patients treated with thrombolytic therapy for mycocardial infarction.

Migraine ScreenerScores likelihood of migraine.

Migraine With Aura Diagnostic CriteriaCriteria for migraine with aura.

Migraine Without Aura Diagnostic CriteriaCriteria for migraine without aura.

New Orleans Head CT CriteriaCriteria for head CT after head trauma.

Ottawa Ankle Rule for the Use of X-Ray in Ankle InjuryDescribes criteria for ankle trauma patients to determine need for imaging.

Ottawa Foot Rule for the Use of X-Ray in Foot InjuryDescribes criteria for foot trauma patients to determine need for imaging.

Panic Disorder ScreenerLikelihood of panic disorder based on features over last 6 months.

PERC Rule for the Assessment of Possible Pulmonary EmbolismRules out PE if no criteria are present and pre-test probability is less than or equal to 15%.

Pneumothorax Degree of CollapseCalculates pneumothorax volume (%) using lung and hemithorax diameters.

Pulmonary Embolism Severity Index (PESI)Stratifies severity of pulmonary embolism from very low to very high risk.

Pulmonary Embolism Wells ScoreCalculates probability of pulmonary embolism.

QT Interval Correction (EKG)Corrects QT interval for heart rate.

Sequential Organ Failure Assessment: SOFA ScorePredicts ICU mortality using clinical and laboratory data.

Simplified Pulmonary Embolism Severity Index (sPESI)Risk stratifies patients with PE and can help identify those suitable for outpatient management.

Sodium Correction in Hyperglycemia (Hillier 1999)Determines if true hyponatremia is present in a patient with hyperglycemia.

TIA Prognosis: Risk of Stroke by 90 Days After PresentationApproximate 90-day risk of stroke following TIA.

Urine anion gapAids in identifying causes of metabolic acidosis where there is no serum anion gap.

Calcium Correction in HypoalbuminemiaCalculates corrected calcium level for patients with hypoalbuminemia.

Calcium Correction in Hypoalbuminemia (SI units)Calculates corrected calcium level for patients with hypoalbuminemia.

Friedewald Equation for Low Density Lipoprotein (LDL-C)Estimates concentration of LDL-C in plasma.

Friedewald Equation for Low Density Lipoprotein (LDL-C, SI units)Estimates concentration of LDL-C in plasma.

HOMA Formula: Homeostasis Model Assessment of Insulin ResistanceEstimates severity of insulin resistance.

NAFLD Fibrosis ScoreUtilises age, hyperglycaemia, BMI, platelet count, albumin, and AST:ALT ratio (AAR) to predict patients with advanced liver fibrosis.

Sodium Correction in Hyperglycemia (Hillier 1999)Determines if true hyponatremia is present in a patient with hyperglycemia.

Stroke Risk in Diabetes Type 2 UKPDS 60Models chance of a first stroke in type 2 diabetes using risk factors.

Water Deficit in HypernatremiaCalculates free water deficit in hypernatremia.

Bayesian Statistics I MultiCalcCalculates statistics from prevalence, sensitivity, and specificity.

Bayesian Statistics II MultiCalcCalculates statistics from true and false positives and negatives.

Blood Pressure Percentiles for Boys (2 - 17 years)Assesses whether child has healthy blood pressure for their height, age, and gender.

Blood Pressure Percentiles for Girls (2 - 17 years)Assesses whether child has healthy blood pressure for their height, age, and gender.

Body Mass Index (BMI) percentiles for boys (2 to 20 years)Assesses whether patient is at a weight appropriate for their height, age, and gender.

Body Mass Index (BMI) percentiles for girls (2 to 20 years)Assesses whether patient is at a weight appropriate for their height, age, and gender.

CDC height for age percentiles for boys (2 to 20 years)Assesses whether patient is at appropriate height for their age.

CDC height for age percentiles for girls (2 to 20 years)Assesses whether patient is at appropriate height for their age.

CDC/NCHS Infant Head Circumference for Age Percentiles (<36 months)Assesses whether patient has appropriate head circumference for their age.

Gail Model for 5 Year Risk of Breast Cancer (1999 paper)Estimates 5-year risk of breast cancer based on key risk factors.

Gail Model for 5 Year Risk of Breast Cancer in Black Women (2007)Estimates 5-year risk of breast cancer in black women.

Glomerular Filtration Rate Estimate in African Americans by AASK EquationEstimates glomerular filtration rate based on creatinine and patient's age and gender.

Kidney Failure Risk (5-year)Estimates risk of kidney failure.

Likelihood Ratio MultiCalcEstimates how much a test result will change the odds of having a disease.

Negative Predictive Value of a TestProbability with a negative screening test of not having the disease.

Odds Ratio and Relative RiskCalculates odds ratio and relative risk.

Positive Predictive Value of a TestProbability with a positive screening test of having the disease.

Post Test Probability from Pre Test Probability, Sensitivity and SpecificityPost-test probability calculator for having a disease.

Post-Test Probability from Likelihood Ratios and Multiple Test ResultsPost-test probability calculator for having a disease.

WHO Assessment of Malnutrition in Boys 2 to 5 years OldWHO score for malnutrition based on age, height and weight.

WHO Assessment of Malnutrition in Girls 2 to 5 years OldWHO score for malnutrition based on age, height and weight.

WHO infant head circumference for age percentiles (<24 months)WHO head circumference percentiles birth to 24 months.

WHO Infant Length for Age Percentiles (<24 months)WHO growth chart: length for age percentiles birth to 24 months.

WHO Infant Weight for Age Percentiles (<24 months)WHO growth chart: weight for age percentiles birth to 24 months.

WHO infant weight for length percentiles (<24 months)WHO growth chart: weight for length percentiles birth to 24 months.

Bedside Index of Severity in Acute Pancreatitis (BISAP) ScorePredicts risk of mortality in acute pancreatitis.

Blatchford score for gastrointestinal bleedingStratifies patients with upper GI bleed, identifying those who can be safely treated as outpatients.

Child Pugh classification for severity of liver diseaseAssesses severity of liver disease.

Child Pugh classification for severity of liver disease (SI units)Assesses severity of liver disease.

CIWA-Ar Clinical Institute Withdrawal Assessment for Alcohol scaleAssesses severity of alcohol withdrawal and helps guide management.

Crohn's Disease Activity Index (CDAI)Assesses severity of Crohn disease.

Glasgow Alcoholic Hepatitis ScoreEstimates mortality risk in patients with alcoholic hepatitis.

Glasgow Blatchford Score for Gastrointestinal BleedingStratifies patients with upper GI bleed, identifying those who can be safely treated as outpatients.

Harvey-Bradshaw Index of Crohn's Disease ActivityAssessment of Crohn's disease activity including extraintestinal features.

Irritable Bowel Syndrome Diagnostic Criteria (Manning Criteria)Diagnostic criteria for irritable bowel syndrome.

Mayo score for assessing ulcerative colitis activityAssesses severity of ulcerative colitis.

NAFLD Fibrosis ScoreUtilises age, hyperglycaemia, BMI, platelet count, albumin, and AST:ALT ratio (AAR) to predict patients with advanced liver fibrosis.

Pancreatitis Prognosis CriteriaMortality scale for acute pancreatitis, based on criteria from admission to day 2 of hospitalization.

Pancreatitis Prognosis Criteria When Disease Due To GallstonesMortality scale for gallstone-related acute pancreatitis, based on criteria from admission to day 2 of hospitalization.

PELD Score for End-Stage Liver Disease (patients less than 12 years old)Calculates the pediatric version of the MELD score for liver cirrhosis severity and transplant planning.

Rockall Score for Upper Gastrointestinal BleedingDetermines severity of GI bleeding.

Stool Osmolal GapDetermines if chronic diarrhea is osmotic or secretory.

APACHE II scoring systemEstimates ICU mortality.

Body Mass Index (Quetelet's index)Assesses whether patient is at a weight appropriate for their height.

Body Surface Area (Du Bois Method)Calculation of body surface area.

Body Surface Area (Mosteller, square root method)Calculation of body surface area.

Body Surface Area Based DosingCalculates drug dose based on body surface area.

Breast Cancer Recurrence Risk After Mastectomy (simple)Assesses risk of breast cancer recurrence after mastectomy based on tumor grade and lymphatic involvement.

Cardiac Risk Index in Noncardiac Surgery (Detsky et. al.)Estimates risk of cardiac complications following noncardiac surgery.

Cardiac Risk Index in Noncardiac Surgery (Goldman, et. al.)Estimates risk of cardiac complications following noncardiac surgery.

Cognitive Impairment Screening with 6 QuestionsScreening tool for cognitive impairment in adults.

Community-acquired pneumonia severity index (PSI) for adultsEstimates risk of mortality in patients with community-acquired pneumonia.

Creatinine clearance estimate by Cockcroft-Gault equationCalculates creatinine clearance according to the Cockcroft-Gault equation.

Creatinine clearance estimate by Cockcroft-Gault equation (SI units)Calculates creatinine clearance according to the Cockcroft-Gault equation.

CURB-65 pneumonia severity scorePredicts risk of mortality in community-acquired pneumonia.

Depression (any) Screening by a Two Item PHQ-2Scores for likelihood of any depression.

Depression (major) Screening by a Two Item PHQ-2Scores for likelihood of major depression.

Fall Risk in Elderly Hospitalized PatientsEstimates risk of fall in elderly patients.

Fracture Index WITH known Bone Mineral Density (BMD)Calculates risk of fracture based on factors including bone mineral density.

Fracture Index WITHOUT known Bone Mineral Density (BMD)Calculates risk of fracture based on factors not including bone mineral density.

Geriatric Depression 1 Item ScreenerAssesses likelihood of depression in elderly patients, based on 1 question.

Geriatric Depression 4 Item ScaleAssesses likelihood of depression in elderly patients, based on 4 questions.

Geriatric Depression ScaleAssesses likelihood of depression in elderly patients.

Glasgow Coma ScaleAssessment of conscious level based on eye, verbal, and motor responses to stimuli.

Glomerular Filtration Rate Estimate by the MDRD EquationEstimates glomerular filtration rate based on creatinine and patient characteristics.

Intracranial Bleeding Risk from Thrombolytic Therapy of MIEstimates risk of cerebral bleeding in patients treated with thrombolytic therapy for mycocardial infarction.

MODS Score: Multiple Organ DysfunctionPredicts hospital/ICU mortality and ICU length of stay based on measures of multiple organ dysfunction.

Norton Scale to Stratify Risk of Pressure SoresAssessment scale for risk of pressure ulcers.

Osteoporosis Risk Assessment by Composite Linear Estimate (ORACLE score)Osteoporosis risk assessment score (age, BMI, hormone replacement, fracture history, ultrasound bone profile index).

Osteoporosis Risk Assessment Index (ORAI)Osteoporosis risk assessment index (age, body weight).

Osteoporosis Risk SCORE (Simple Calculated Osteoporosis Risk Estimation)Osteoporosis risk assessment score (ancestry, rheumatoid arthritis, fracture history, age, hormone replacement, weight).

Palliative Prognostic Score in Terminal Illness30-day probability of survival in terminal illness.

Prostatism Symptom ScoreScores symptoms of prostatism (minimal, moderate, severe).

Absolute Eosinophil CountAssesses number of eosinophils (e.g., in people with allergic or autoimmune conditions, or parasite infections).

Absolute Lymphocyte CountEstimates number of lymphocytes and predicts CD4 count.

Absolute Neutrophil CountMeasures number of neutrophils (used to asses neutropenia or neutrophilia).

APACHE II scoring systemEstimates ICU mortality.

Atrial Fibrillation CHA(2)DS(2)-VASc Score for Stroke RiskEstimates risk of stroke in patients with atrial fibrillation.

Atrial fibrillation CHADS(2) score for stroke riskEstimates risk of stroke in patients with atrial fibrillation.

Bleeding Risk (any bleeding complication) on Warfarin TherapyEstimates risk of any bleeding complications for patients on warfarin.

Bleeding Risk (major complication) on Warfarin TherapyEstimates risk of major bleeding complications for patients on warfarin.

Bleeding Risk Index for Warfarin TherapyEstimates risk of bleeding for patients on warfarin.

Body Mass Index (Quetelet's index)Assesses whether patient is at a weight appropriate for their height.

Conventional unit to SI unit conversions: Chemistry testsUnit conversions for chemistries.

Conventional unit to SI unit conversions: Immunology test valuesUnit conversions for immunology tests.

Gail Model for 5 Year Risk of Breast Cancer (1999 paper)Estimates 5-year risk of breast cancer based on key risk factors.

Gail Model for 5 Year Risk of Breast Cancer in Black Women (2007)Estimates 5-year risk of breast cancer in black women.

International Prognostic Score in Hodgkin LymphomaEstimates freedom from progression and overall survival in patients with Hodgkin lymphoma.

MODS Score: Multiple Organ DysfunctionPredicts hospital/ICU mortality and ICU length of stay based on measures of multiple organ dysfunction.

Padua Score for Assessing Venous Thromboembolism Risk in Hospitalized PatientsDetermines need for VTE prophylaxis in hospitalized patients.

PASI Psoriasis Area and Severity IndexSeverity index for psoriasis based on surface area, erythema, induration, desquamation.

Polycythemia Vera Diagnostic CriteriaCriteria for polycythemia vera including splenomegaly and laboratory features.

Pretest Probability of Heparin Induced Thrombocytopenia (4-T's score)Assesses the risk for heparin-induced thrombocytopenia.

Pulmonary Embolism Risk by Pisa Study (with chest x-ray)Risk score for pulmonary embolism (age, gender, risk factors) including chest x-ray.

Pulmonary Embolism Risk by Pisa Study (without chest x-ray)Risk score for pulmonary embolism (age, gender, risk factors) excluding chest x-ray.

Pulmonary Embolism Wells ScoreCalculates probability of pulmonary embolism.

SI unit to conventional unit conversions: Immunology test valuesUnit conversions for immunology tests.

Simplified Pulmonary Embolism Severity Index (sPESI)Risk stratifies patients with PE and can help identify those suitable for outpatient management.

SI unit to conventional unit conversions: Chemistry and endocrine testsSI unit conversions for chemistries and endocrine tests.

Aminoglycoside Clearance EstimateEstimates rate of aminoglycoside clearance.

Body Surface Area Based DosingCalculates drug dose based on body surface area.

Clinical Pulmonary Infection Score (CPIS)Aids in early diagnosis and treatment of ventilator-associated pneumonia.

Community-acquired pneumonia severity index (PSI) for adultsEstimates risk of mortality in patients with community-acquired pneumonia.

CURB-65 pneumonia severity scorePredicts risk of mortality in community-acquired pneumonia.

Hepatitis Discriminant Function for Corticosteroid Therapy in Alcoholic HepatitisScore parameters including prothrombin time and bilirubin level.

Jones Criteria for Diagnosis of Rheumatic FeverDiagnostic criteria for rheumatic fever.

Kawasaki Disease Diagnostic CriteriaDiagnostic criteria for Kawasaki disease.

PELD Score for End-Stage Liver Disease (patients less than 12 years old)Calculates the pediatric version of the MELD score for liver cirrhosis severity and transplant planning.

Sore Throat (Pharyngitis) Evaluation and Treatment Criteria (McIsaac)Scoring system for sore throat including clinical features such as age, fever, lymphadenopathy or exudate.

Temperature Unit ConversionsTemperature converter: Celsius, Fahrenheit, Kelvin.

Alcohol Consumption Screening AUDIT QuestionnaireScreening tool to identify alcohol use disorders.

Canadian Head CT Rule for Minor Head InjuryAssesses which patients with minor head injury need CT scan.

Conventional unit to SI unit conversions: Chemistry testsUnit conversions for chemistries.

Conventional unit to SI unit conversions: Immunology test valuesUnit conversions for immunology tests.

EuroSCORE for Cardiac Surgery Risk Assessment (additive version)Calculates risk of mortality in patients undergoing cardiac surgery.

Friedewald Equation for Low Density Lipoprotein (LDL-C, SI units)Estimates concentration of LDL-C in plasma.

Glasgow Coma ScaleAssessment of conscious level based on eye, verbal, and motor responses to stimuli.

International Prognostic Score in Hodgkin LymphomaEstimates freedom from progression and overall survival in patients with Hodgkin lymphoma.

Kawasaki Disease Diagnostic CriteriaDiagnostic criteria for Kawasaki disease.

Mantle Cell Lymphoma International Prognostic Index (MIPI)Estimates prognosis in mantle cell lymphoma.

Metabolic Syndrome Criteria (EGIR)European Group for the Study of Insulin Resistance calculator for metabolic syndrome.

Metabolic Syndrome Criteria (IDF 2005)International Diabetes Federation calculator for metabolic syndrome.

Ottawa Ankle Rule for the Use of X-Ray in Ankle InjuryDescribes criteria for ankle trauma patients to determine need for imaging.

Ottawa Foot Rule for the Use of X-Ray in Foot InjuryDescribes criteria for foot trauma patients to determine need for imaging.

Ottawa Knee Rule for use of X Ray in Knee InjuryDescribes criteria for knee trauma patients to determine need for imaging.

SI Unit Conversions: Body Fluid ChemistriesSI unit conversions for multiple body fluid chemistries.

SI unit to conventional unit conversions: Chemistry and endocrine testsSI unit conversions for chemistries and endocrine tests.

SI unit to conventional unit conversions: Immunology test valuesUnit conversions for immunology tests.

WHO Assessment of Malnutrition in Boys 2 to 5 years OldWHO score for malnutrition based on age, height and weight.

WHO Assessment of Malnutrition in Girls 2 to 5 years OldWHO score for malnutrition based on age, height and weight.

WHO Infant Length for Age Percentiles (<24 months)WHO growth chart: length for age percentiles birth to 24 months.

WHO Infant Weight for Age Percentiles (<24 months)WHO growth chart: weight for age percentiles birth to 24 months.

Bayesian Statistics I MultiCalcCalculates statistics from prevalence, sensitivity, and specificity.

Bayesian Statistics II MultiCalcCalculates statistics from true and false positives and negatives.

Benefit Increase / Number Needed to Treat MulticalcCalculates absolute and relative benefit and number needed to treat.

Likelihood Ratio MultiCalcEstimates how much a test result will change the odds of having a disease.

Negative Predictive Value of a TestProbability with a negative screening test of not having the disease.

Odds Ratio and Relative RiskCalculates odds ratio and relative risk.

Positive Predictive Value of a TestProbability with a positive screening test of having the disease.

Post Test Probability from Pre Test Probability, Sensitivity and SpecificityPost-test probability calculator for having a disease.

Post-Test Probability from Likelihood Ratios and Multiple Test ResultsPost-test probability calculator for having a disease.

Risk Reduction / Number Needed to Treat MulticalcCalculates risk reduction/number needed to treat.

Aminoglycoside Clearance EstimateEstimates rate of aminoglycoside clearance.

Anion GapAids in identifying causes of metabolic acidosis.

Anion Gap Delta Delta Gradient MulticalcAids in identifying acid-base disorders.

Anion Gap Delta Delta Ratio MulticalcAids in identifying acid-base disorders.

Anion Gap in Hypoalbumin StatesCalculation of anion gap (to identify acid-base disorders) taking hypoalbuminemia into account.

APACHE II scoring systemEstimates ICU mortality.

Base Excess DeterminationAids in identifying acid-base disorders.

Bicarbonate DeficitCalculates total bicarbonate deficit.

Burn Injury Fluid Resuscitation (Brooke estimate)Estimates fluid requirements following burn injury.

Burn Injury Fluid Resuscitation (Demling dextran estimate)Estimates colloid fluid requirements following burn injury.

Burn Injury Fluid Resuscitation (Evans estimate)Estimates fluid requirements following burn injury.

Burn Injury Fluid Resuscitation (Modified Brooke crystalloid estimate)Estimates fluid requirements following burn injury.

Burn Injury Fluid Resuscitation (Slater estimate)Estimates fluid requirements following burn injury.

Burn Injury Fluid Resuscitation, Adult (Parkland crystalloid estimate)Often used to estimate fluid requirements in adults following major burn injury.

Conventional unit to SI unit conversions: Chemistry testsUnit conversions for chemistries.

Conventional unit to SI unit conversions: Immunology test valuesUnit conversions for immunology tests.

Creatinine clearance (measured)Measures creatinine clearance.

Creatinine clearance estimate by Cockcroft-Gault equationCalculates creatinine clearance according to the Cockcroft-Gault equation.

Creatinine clearance estimate by Cockcroft-Gault equation (SI units)Calculates creatinine clearance according to the Cockcroft-Gault equation.

Fractional Excretion of MagnesiumCalculates fractional excretion of magnesium (used to assess hypomagnesemia).

Fractional Excretion of Magnesium (SI units)Calculates fractional excretion of magnesium (used to assess hypomagnesemia).

Fractional Excretion of SodiumCalculates fractional excretion of sodium, helping to assess acute kidney injury.

Fractional Excretion of Sodium (SI units)Calculates fractional excretion of sodium, helping to assess acute kidney injury.

Glomerular Filtration Rate Estimate by CKD-EPI EquationEstimates glomerular filtration rate based on creatinine and patient characteristics.

Glomerular Filtration Rate Estimate by Quadratic EquationEstimates glomerular filtration rate based on creatinine and patient's age and gender.

Glomerular Filtration Rate Estimate by Schwartz FormulaEstimates glomerular filtration rate in children based on creatinine and patient's height.

Glomerular Filtration Rate Estimate by the Abbreviated MDRD Study EquationEstimates glomerular filtration rate based on creatinine and patient characteristics.

Glomerular Filtration Rate Estimate by the Abbreviated MDRD Study Equation (SI units)Estimates glomerular filtration rate based on creatinine and patient characteristics.

Glomerular Filtration Rate Estimate by the IDMS-Traceable MDRD Study EquationEstimates glomerular filtration rate based on creatinine and patient characteristics.

Glomerular Filtration Rate Estimate by the MDRD EquationEstimates glomerular filtration rate based on creatinine and patient characteristics.

Glomerular Filtration Rate Estimate by the MDRD Equation (SI units)Estimates glomerular filtration rate based on creatinine and patient characteristics.

Glomerular Filtration Rate Estimate by Updated Schwartz FormulaEstimates glomerular filtration rate in children based on creatinine and patient's height.

Glomerular Filtration Rate Estimate in African Americans by AASK EquationEstimates glomerular filtration rate based on creatinine and patient's age and gender.

Kidney Failure Risk (5-year)Estimates risk of kidney failure.

Kt/V Dialysis Dose Daugirdas FormulaQuantifies adequacy of dialysis treatment.

Maintenance Fluid Calculation for ChildrenCalculates maintenance fluid requirements by weight.

MODS Score: Multiple Organ DysfunctionPredicts hospital/ICU mortality and ICU length of stay based on measures of multiple organ dysfunction.

Osmolal Gap CalculatorCalculates osmolal gap to detect unmeasured compounds in serum.

Osmolal Gap Calculator (SI units)Calculates osmolal gap to detect unmeasured compounds in serum (SI units).

Osmolality Estimator (serum)Estimates serum osmolality with sodium, glucose and BUN.

Osmolar ClearanceCalculates renal osmolar clearance using urine/serum Osm and urine volume per day.

Prostatism Symptom ScoreScores symptoms of prostatism (minimal, moderate, severe).

Residual Renal Function in Hemodialysis Patients (Kru)Residual kidney function for people receiving hemodialysis.

Sequential Organ Failure Assessment: SOFA ScorePredicts ICU mortality using clinical and laboratory data.

SI Unit Conversions: Body Fluid ChemistriesSI unit conversions for multiple body fluid chemistries.

SI unit to conventional unit conversions: Chemistry and endocrine testsSI unit conversions for chemistries and endocrine tests.

SI unit to conventional unit conversions: Immunology test valuesUnit conversions for immunology tests.

Sodium Correction in Hyperglycemia (Hillier 1999)Determines if true hyponatremia is present in a patient with hyperglycemia.

Urine anion gapAids in identifying causes of metabolic acidosis where there is no serum anion gap.

ABCD2 Score to Predict Stroke Risk after TIAEstimates the risk of stroke following transient ischemic attack.

Apgar scoreAssesses neonates 1 and 5 minutes after birth.

Atrial Fibrillation CHA(2)DS(2)-VASc Score for Stroke RiskEstimates risk of stroke in patients with atrial fibrillation.

Atrial fibrillation CHADS(2) score for stroke riskEstimates risk of stroke in patients with atrial fibrillation.

Bleeding Risk (any bleeding complication) on Warfarin TherapyEstimates risk of any bleeding complications for patients on warfarin.

Bleeding Risk (major complication) on Warfarin TherapyEstimates risk of major bleeding complications for patients on warfarin.

Bleeding Risk Index for Warfarin TherapyEstimates risk of bleeding for patients on warfarin.

Blood Ethanol Concentration EstimationEstimates blood ethanol concentration.

Canadian Head CT Rule for Minor Head InjuryAssesses which patients with minor head injury need CT scan.

CDC/NCHS Infant Head Circumference for Age Percentiles (<36 months)Assesses whether patient has appropriate head circumference for their age.

Cognitive Impairment Screening with 6 QuestionsScreening tool for cognitive impairment in adults.

Depression (any) Screening by a Two Item PHQ-2Scores for likelihood of any depression.

Depression (major) Screening by a Two Item PHQ-2Scores for likelihood of major depression.

Epworth Sleepiness Scale (ESS)Measures daytime sleepiness.

Fall Risk in Elderly Hospitalized PatientsEstimates risk of fall in elderly patients.

Geriatric Depression 1 Item ScreenerAssesses likelihood of depression in elderly patients, based on 1 question.

Geriatric Depression 4 Item ScaleAssesses likelihood of depression in elderly patients, based on 4 questions.

Geriatric Depression ScaleAssesses likelihood of depression in elderly patients.

Glasgow Coma ScaleAssessment of conscious level based on eye, verbal, and motor responses to stimuli.

Intracranial Bleeding Risk from Thrombolytic Therapy of MIEstimates risk of cerebral bleeding in patients treated with thrombolytic therapy for mycocardial infarction.

Migraine ScreenerScores likelihood of migraine.

Migraine With Aura Diagnostic CriteriaCriteria for migraine with aura.

Migraine Without Aura Diagnostic CriteriaCriteria for migraine without aura.

New Orleans Head CT CriteriaCriteria for head CT after head trauma.

NIH Stroke ScoreQuantifies stroke severity based on multiple neurologic factors.

Oswestry Disability Index Version 1Disability index for low back pain based on questions in 10 areas of function.

Oswestry Disability Index Version 2Disability index for low back pain based on questions in 10 areas of function.

Panic Disorder ScreenerLikelihood of panic disorder based on features over last 6 months.

Stroke Risk in Diabetes Type 2 UKPDS 60Models chance of a first stroke in type 2 diabetes using risk factors.

Stroke Risk in Female Patients 55-84 Years Old (Framingham data)Stroke risk for women.

Stroke Risk in Male Patients 55-84 Years Old (Framingham data)Stroke risk for men.

TIA Prognosis: Risk of Stroke by 90 Days After PresentationApproximate 90-day risk of stroke following TIA.

Apgar scoreAssesses neonates 1 and 5 minutes after birth.

Blood Pressure Percentiles for Boys (2 - 17 years)Assesses whether child has healthy blood pressure for their height, age, and gender.

Blood Pressure Percentiles for Girls (2 - 17 years)Assesses whether child has healthy blood pressure for their height, age, and gender.

Body Mass Index (BMI) percentiles for boys (2 to 20 years)Assesses whether patient is at a weight appropriate for their height, age, and gender.

Body Mass Index (BMI) percentiles for girls (2 to 20 years)Assesses whether patient is at a weight appropriate for their height, age, and gender.

Body Mass Index (Quetelet's index)Assesses whether patient is at a weight appropriate for their height.

Body Surface Area (Du Bois Method)Calculation of body surface area.

Body Surface Area (Mosteller, square root method)Calculation of body surface area.

Body Surface Area Based DosingCalculates drug dose based on body surface area.

Breast Cancer Recurrence Risk After Mastectomy (simple)Assesses risk of breast cancer recurrence after mastectomy based on tumor grade and lymphatic involvement.

Burn Injury Fluid Resuscitation, Adult (Parkland crystalloid estimate)Often used to estimate fluid requirements in adults following major burn injury.

CDC height for age percentiles for boys (2 to 20 years)Assesses whether patient is at appropriate height for their age.

CDC height for age percentiles for girls (2 to 20 years)Assesses whether patient is at appropriate height for their age.

CDC/NCHS Infant Head Circumference for Age Percentiles (<36 months)Assesses whether patient has appropriate head circumference for their age.

Cognitive Impairment Screening with 6 QuestionsScreening tool for cognitive impairment in adults.

Conventional unit to SI unit conversions: Chemistry testsUnit conversions for chemistries.

Conventional unit to SI unit conversions: Immunology test valuesUnit conversions for immunology tests.

Depression (any) Screening by a Two Item PHQ-2Scores for likelihood of any depression.

Depression (major) Screening by a Two Item PHQ-2Scores for likelihood of major depression.

Gail Model for 5 Year Risk of Breast Cancer (1999 paper)Estimates 5-year risk of breast cancer based on key risk factors.

Gail Model for 5 Year Risk of Breast Cancer in Black Women (2007)Estimates 5-year risk of breast cancer in black women.

Geriatric Depression 1 Item ScreenerAssesses likelihood of depression in elderly patients, based on 1 question.

Geriatric Depression 4 Item ScaleAssesses likelihood of depression in elderly patients, based on 4 questions.

Geriatric Depression ScaleAssesses likelihood of depression in elderly patients.

Gestational Age from Estimated Date of Delivery (EDD)Calculates gestational age based on estimated date of delivery.

Glasgow Coma ScaleAssessment of conscious level based on eye, verbal, and motor responses to stimuli.

Irritable Bowel Syndrome Diagnostic Criteria (Manning Criteria)Diagnostic criteria for irritable bowel syndrome.

Kt/V Dialysis Dose Daugirdas FormulaQuantifies adequacy of dialysis treatment.

Maintenance Fluid Calculation for ChildrenCalculates maintenance fluid requirements by weight.

Migraine ScreenerScores likelihood of migraine.

Migraine With Aura Diagnostic CriteriaCriteria for migraine with aura.

Migraine Without Aura Diagnostic CriteriaCriteria for migraine without aura.

NIH Stroke ScoreQuantifies stroke severity based on multiple neurologic factors.

Norton Scale to Stratify Risk of Pressure SoresAssessment scale for risk of pressure ulcers.

Osteoporosis Risk Assessment by Composite Linear Estimate (ORACLE score)Osteoporosis risk assessment score (age, BMI, hormone replacement, fracture history, ultrasound bone profile index).

Osteoporosis Risk Assessment Index (ORAI)Osteoporosis risk assessment index (age, body weight).

Osteoporosis Risk SCORE (Simple Calculated Osteoporosis Risk Estimation)Osteoporosis risk assessment score (ancestry, rheumatoid arthritis, fracture history, age, hormone replacement, weight).

Palliative Prognostic Score in Terminal Illness30-day probability of survival in terminal illness.

Panic Disorder ScreenerLikelihood of panic disorder based on features over last 6 months.

Prostatism Symptom ScoreScores symptoms of prostatism (minimal, moderate, severe).

Pulmonary Embolism Wells ScoreCalculates probability of pulmonary embolism.

Roland-Morris Disability ScoreScoring for physical disability caused by low back pain.

SI unit to conventional unit conversions: Chemistry and endocrine testsSI unit conversions for chemistries and endocrine tests.

SI unit to conventional unit conversions: Immunology test valuesUnit conversions for immunology tests.

Temperature Unit ConversionsTemperature converter: Celsius, Fahrenheit, Kelvin.

Venous Leg Ulcer Healing PredictionScore for venous leg ulcer healing in 24 weeks based on duration and area.

Weight Unit ConversionsInternational weight conversions.

WHO infant head circumference for age percentiles (<24 months)WHO head circumference percentiles birth to 24 months.

WHO Infant Weight for Age Percentiles (<24 months)WHO growth chart: weight for age percentiles birth to 24 months.

WHO infant weight for length percentiles (<24 months)WHO growth chart: weight for length percentiles birth to 24 months.

Alcohol Consumption Screening AUDIT QuestionnaireScreening tool to identify alcohol use disorders.

Anion Gap in Hypoalbumin StatesCalculation of anion gap (to identify acid-base disorders) taking hypoalbuminemia into account.

Body Mass Index (Quetelet's index)Assesses whether patient is at a weight appropriate for their height.

Body Surface Area (Du Bois Method)Calculation of body surface area.

Body Surface Area (Mosteller, square root method)Calculation of body surface area.

Body Surface Area Based DosingCalculates drug dose based on body surface area.

Calcium Correction in HypoalbuminemiaCalculates corrected calcium level for patients with hypoalbuminemia.

Calcium Correction in Hypoalbuminemia (SI units)Calculates corrected calcium level for patients with hypoalbuminemia.

CDC/NCHS Infant Head Circumference for Age Percentiles (<36 months)Assesses whether patient has appropriate head circumference for their age.

Friedewald Equation for Low Density Lipoprotein (LDL-C)Estimates concentration of LDL-C in plasma.

Friedewald Equation for Low Density Lipoprotein (LDL-C, SI units)Estimates concentration of LDL-C in plasma.

Metabolic Syndrome Criteria (AACE 2003)American Association of Clinical Endocrinologists calculator for metabolic syndrome.

Metabolic Syndrome Criteria (AHA/NHLBI 2005)American Heart Association/National Heart, Lung and Blood Institute calculator for metabolic syndrome.

Metabolic Syndrome Criteria (EGIR)European Group for the Study of Insulin Resistance calculator for metabolic syndrome.

Metabolic Syndrome Criteria (IDF 2005)International Diabetes Federation calculator for metabolic syndrome.

WHO Assessment of Malnutrition in Boys 2 to 5 years OldWHO score for malnutrition based on age, height and weight.

WHO Assessment of Malnutrition in Girls 2 to 5 years OldWHO score for malnutrition based on age, height and weight.

WHO Infant Length for Age Percentiles (<24 months)WHO growth chart: length for age percentiles birth to 24 months.

WHO Infant Weight for Age Percentiles (<24 months)WHO growth chart: weight for age percentiles birth to 24 months.

Absolute Lymphocyte CountEstimates number of lymphocytes and predicts CD4 count.

Absolute Neutrophil CountMeasures number of neutrophils (used to asses neutropenia or neutrophilia).

Breast Cancer Recurrence Risk After Mastectomy (simple)Assesses risk of breast cancer recurrence after mastectomy based on tumor grade and lymphatic involvement.

Gail Model for 5 Year Risk of Breast Cancer (1999 paper)Estimates 5-year risk of breast cancer based on key risk factors.

Gail Model for 5 Year Risk of Breast Cancer in Black Women (2007)Estimates 5-year risk of breast cancer in black women.

International Prognostic Score in Hodgkin LymphomaEstimates freedom from progression and overall survival in patients with Hodgkin lymphoma.

Mantle Cell Lymphoma International Prognostic Index (MIPI)Estimates prognosis in mantle cell lymphoma.

Cardiac Risk Index for Orthopedic Surgery (Lee)Estimates risk of cardiac complications following orthopedic surgery.

Fall Risk in Elderly Hospitalized PatientsEstimates risk of fall in elderly patients.

Fracture Index WITH known Bone Mineral Density (BMD)Calculates risk of fracture based on factors including bone mineral density.

Fracture Index WITHOUT known Bone Mineral Density (BMD)Calculates risk of fracture based on factors not including bone mineral density.

International Prognostic Index for Non-Hodgkin LymphomaPrognostic score including age and stage.

International Prognostic Score in Hodgkin Lymphoma (2012 update)Prognostic score including stage and laboratory features.

Multinational Association for Supportive Care in Cancer (MASCC) risk index for patients with neutropenic feverRisk index for people with neutropenic fever.

Myelodysplastic Syndrome International Prognostic Scoring SystemPrognostic assessment for myelodysplastic syndrome.

Osteoporosis Risk Assessment by Composite Linear Estimate (ORACLE score)Osteoporosis risk assessment score (age, BMI, hormone replacement, fracture history, ultrasound bone profile index).

Osteoporosis Risk Assessment Index (ORAI)Osteoporosis risk assessment index (age, body weight).

Osteoporosis Risk SCORE (Simple Calculated Osteoporosis Risk Estimation)Osteoporosis risk assessment score (ancestry, rheumatoid arthritis, fracture history, age, hormone replacement, weight).

Oswestry Disability Index Version 1Disability index for low back pain based on questions in 10 areas of function.

Oswestry Disability Index Version 2Disability index for low back pain based on questions in 10 areas of function.

Ottawa Ankle Rule for the Use of X-Ray in Ankle InjuryDescribes criteria for ankle trauma patients to determine need for imaging.

Ottawa Foot Rule for the Use of X-Ray in Foot InjuryDescribes criteria for foot trauma patients to determine need for imaging.

Ottawa Knee Rule for use of X Ray in Knee InjuryDescribes criteria for knee trauma patients to determine need for imaging.

Polycythemia Vera Diagnostic CriteriaCriteria for polycythemia vera including splenomegaly and laboratory features.

Roland-Morris Disability ScoreScoring for physical disability caused by low back pain.

Rotator Cuff Tear DiagnosisProbability of rotator cuff tear based on physical findings.

Migraine ScreenerScores likelihood of migraine.

Migraine With Aura Diagnostic CriteriaCriteria for migraine with aura.

Migraine Without Aura Diagnostic CriteriaCriteria for migraine without aura.

Oswestry Disability Index Version 1Disability index for low back pain based on questions in 10 areas of function.

Oswestry Disability Index Version 2Disability index for low back pain based on questions in 10 areas of function.

Ottawa Ankle Rule for the Use of X-Ray in Ankle InjuryDescribes criteria for ankle trauma patients to determine need for imaging.

Ottawa Foot Rule for the Use of X-Ray in Foot InjuryDescribes criteria for foot trauma patients to determine need for imaging.

Roland-Morris Disability ScoreScoring for physical disability caused by low back pain.

Blood Pressure Percentiles for Boys (2 - 17 years)Assesses whether child has healthy blood pressure for their height, age, and gender.

Blood Pressure Percentiles for Girls (2 - 17 years)Assesses whether child has healthy blood pressure for their height, age, and gender.

Body Mass Index (BMI) percentiles for boys (2 to 20 years)Assesses whether patient is at a weight appropriate for their height, age, and gender.

Body Mass Index (BMI) percentiles for girls (2 to 20 years)Assesses whether patient is at a weight appropriate for their height, age, and gender.

Body Mass Index (Quetelet's index)Assesses whether patient is at a weight appropriate for their height.

CDC height for age percentiles for boys (2 to 20 years)Assesses whether patient is at appropriate height for their age.

CDC height for age percentiles for girls (2 to 20 years)Assesses whether patient is at appropriate height for their age.

Gail Model for 5 Year Risk of Breast Cancer (1999 paper)Estimates 5-year risk of breast cancer based on key risk factors.

Gail Model for 5 Year Risk of Breast Cancer in Black Women (2007)Estimates 5-year risk of breast cancer in black women.

Gestational Age from Estimated Date of Delivery (EDD)Calculates gestational age based on estimated date of delivery.

Irritable Bowel Syndrome Diagnostic Criteria (Manning Criteria)Diagnostic criteria for irritable bowel syndrome.

PELD Score for End-Stage Liver Disease (patients less than 12 years old)Calculates the pediatric version of the MELD score for liver cirrhosis severity and transplant planning.

Prostatism Symptom ScoreScores symptoms of prostatism (minimal, moderate, severe).

Standard Drink EquivalentsAlcohol drink equivalents.

Temperature Unit ConversionsTemperature converter: Celsius, Fahrenheit, Kelvin.

Weight Unit ConversionsInternational weight conversions.

A-a GradientCalculates difference between alveolar and arterial oxygen concentration.

Apgar scoreAssesses neonates 1 and 5 minutes after birth.

Blood Pressure Percentiles for Boys (2 - 17 years)Assesses whether child has healthy blood pressure for their height, age, and gender.

Blood Pressure Percentiles for Girls (2 - 17 years)Assesses whether child has healthy blood pressure for their height, age, and gender.

Body Mass Index (BMI) percentiles for boys (2 to 20 years)Assesses whether patient is at a weight appropriate for their height, age, and gender.

Body Mass Index (BMI) percentiles for girls (2 to 20 years)Assesses whether patient is at a weight appropriate for their height, age, and gender.

Body Surface Area Based DosingCalculates drug dose based on body surface area.

CDC height for age percentiles for boys (2 to 20 years)Assesses whether patient is at appropriate height for their age.

CDC height for age percentiles for girls (2 to 20 years)Assesses whether patient is at appropriate height for their age.

CDC/NCHS Infant Head Circumference for Age Percentiles (<36 months)Assesses whether patient has appropriate head circumference for their age.

Gestational Age from Estimated Date of Delivery (EDD)Calculates gestational age based on estimated date of delivery.

Glomerular Filtration Rate Estimate by Schwartz FormulaEstimates glomerular filtration rate in children based on creatinine and patient's height.

Glomerular Filtration Rate Estimate by Updated Schwartz FormulaEstimates glomerular filtration rate in children based on creatinine and patient's height.

Jones Criteria for Diagnosis of Rheumatic FeverDiagnostic criteria for rheumatic fever.

Kawasaki Disease Diagnostic CriteriaDiagnostic criteria for Kawasaki disease.

Maintenance Fluid Calculation for ChildrenCalculates maintenance fluid requirements by weight.

Newborn Hyperbilirubinemia AssessmentAssessment including infant age, bilirubin level, and clinical risk group.

PELD Score for End-Stage Liver Disease (patients less than 12 years old)Calculates the pediatric version of the MELD score for liver cirrhosis severity and transplant planning.

Temperature Unit ConversionsTemperature converter: Celsius, Fahrenheit, Kelvin.

Weight Unit ConversionsInternational weight conversions.

WHO Assessment of Malnutrition in Boys 2 to 5 years OldWHO score for malnutrition based on age, height and weight.

WHO Assessment of Malnutrition in Girls 2 to 5 years OldWHO score for malnutrition based on age, height and weight.

WHO infant head circumference for age percentiles (<24 months)WHO head circumference percentiles birth to 24 months.

WHO Infant Length for Age Percentiles (<24 months)WHO growth chart: length for age percentiles birth to 24 months.

WHO Infant Weight for Age Percentiles (<24 months)WHO growth chart: weight for age percentiles birth to 24 months.

WHO infant weight for length percentiles (<24 months)WHO growth chart: weight for length percentiles birth to 24 months.

Aminoglycoside Clearance EstimateEstimates rate of aminoglycoside clearance.

Body Surface Area Based DosingCalculates drug dose based on body surface area.

Conventional unit to SI unit conversions: Chemistry testsUnit conversions for chemistries.

Conventional unit to SI unit conversions: Immunology test valuesUnit conversions for immunology tests.

SI unit to conventional unit conversions: Chemistry and endocrine testsSI unit conversions for chemistries and endocrine tests.

SI unit to conventional unit conversions: Immunology test valuesUnit conversions for immunology tests.

Standard Drink EquivalentsAlcohol drink equivalents.

Body Mass Index (BMI) percentiles for boys (2 to 20 years)Assesses whether patient is at a weight appropriate for their height, age, and gender.

Body Mass Index (BMI) percentiles for girls (2 to 20 years)Assesses whether patient is at a weight appropriate for their height, age, and gender.

Body Mass Index (Quetelet's index)Assesses whether patient is at a weight appropriate for their height.

Body Surface Area (Du Bois Method)Calculation of body surface area.

Body Surface Area (Mosteller, square root method)Calculation of body surface area.

CDC height for age percentiles for boys (2 to 20 years)Assesses whether patient is at appropriate height for their age.

CDC height for age percentiles for girls (2 to 20 years)Assesses whether patient is at appropriate height for their age.

Epworth Sleepiness Scale (ESS)Measures daytime sleepiness.

Fracture Index WITH known Bone Mineral Density (BMD)Calculates risk of fracture based on factors including bone mineral density.

Fracture Index WITHOUT known Bone Mineral Density (BMD)Calculates risk of fracture based on factors not including bone mineral density.

Norton Scale to Stratify Risk of Pressure SoresAssessment scale for risk of pressure ulcers.

Osteoporosis Risk Assessment by Composite Linear Estimate (ORACLE score)Osteoporosis risk assessment score (age, BMI, hormone replacement, fracture history, ultrasound bone profile index).

Osteoporosis Risk Assessment Index (ORAI)Osteoporosis risk assessment index (age, body weight).

Osteoporosis Risk SCORE (Simple Calculated Osteoporosis Risk Estimation)Osteoporosis risk assessment score (ancestry, rheumatoid arthritis, fracture history, age, hormone replacement, weight).

Oswestry Disability Index Version 1Disability index for low back pain based on questions in 10 areas of function.

Oswestry Disability Index Version 2Disability index for low back pain based on questions in 10 areas of function.

Roland-Morris Disability ScoreScoring for physical disability caused by low back pain.

Rotator Cuff Tear DiagnosisProbability of rotator cuff tear based on physical findings.

Temperature Unit ConversionsTemperature converter: Celsius, Fahrenheit, Kelvin.

Weight Unit ConversionsInternational weight conversions.

WHO Assessment of Malnutrition in Boys 2 to 5 years OldWHO score for malnutrition based on age, height and weight.

WHO Assessment of Malnutrition in Girls 2 to 5 years OldWHO score for malnutrition based on age, height and weight.

Alcohol Consumption Screening AUDIT QuestionnaireScreening tool to identify alcohol use disorders.

Cognitive Impairment Screening with 6 QuestionsScreening tool for cognitive impairment in adults.

Depression (any) Screening by a Two Item PHQ-2Scores for likelihood of any depression.

Depression (major) Screening by a Two Item PHQ-2Scores for likelihood of major depression.

Epworth Sleepiness Scale (ESS)Measures daytime sleepiness.

Geriatric Depression 1 Item ScreenerAssesses likelihood of depression in elderly patients, based on 1 question.

Geriatric Depression 4 Item ScaleAssesses likelihood of depression in elderly patients, based on 4 questions.

Geriatric Depression ScaleAssesses likelihood of depression in elderly patients.

Panic Disorder ScreenerLikelihood of panic disorder based on features over last 6 months.

A-a GradientCalculates difference between alveolar and arterial oxygen concentration.

APACHE II scoring systemEstimates ICU mortality.

BAP-65 prediction of in-hospital mortality and need for mechanical ventilation in COPDPredicts risk of mortality and need for mechanical ventilation in acute exacerbations of COPD.

Base Excess DeterminationAids in identifying acid-base disorders.

Bleeding Risk (any bleeding complication) on Warfarin TherapyEstimates risk of any bleeding complications for patients on warfarin.

Bleeding Risk (major complication) on Warfarin TherapyEstimates risk of major bleeding complications for patients on warfarin.

BODE Index for COPD Survival PredictionEstimates prognosis in patients with COPD based on body mass index, airflow obstruction, dyspnea, and exercise.

Clinical Pulmonary Infection Score (CPIS)Aids in early diagnosis and treatment of ventilator-associated pneumonia.

Community-acquired pneumonia severity index (PSI) for adultsEstimates risk of mortality in patients with community-acquired pneumonia.

CURB-65 pneumonia severity scorePredicts risk of mortality in community-acquired pneumonia.

Epworth Sleepiness Scale (ESS)Measures daytime sleepiness.

Functional Residual CapacityCalculates functional residual capacity from sum of expiratory reserve and residual volume.

MODS Score: Multiple Organ DysfunctionPredicts hospital/ICU mortality and ICU length of stay based on measures of multiple organ dysfunction.

Padua Score for Assessing Venous Thromboembolism Risk in Hospitalized PatientsDetermines need for VTE prophylaxis in hospitalized patients.

Peak Expiratory Flow PredictionPredicts peak expiratory flow based on height and age.

Pneumothorax Degree of CollapseCalculates pneumothorax volume (%) using lung and hemithorax diameters.

Predicted postoperative FEV1 following lung resection surgery (anatomic method)Predicted postoperative FEV1 after lung resection using lung anatomy.

Predicted postoperative FEV1 following lung resection surgery (perfusion method)Predicted postoperative FEV1 after lung resection using perfusion scan.

Pulmonary Embolism Risk by Pisa Study (with chest x-ray)Risk score for pulmonary embolism (age, gender, risk factors) including chest x-ray.

Pulmonary Embolism Risk by Pisa Study (without chest x-ray)Risk score for pulmonary embolism (age, gender, risk factors) excluding chest x-ray.

Pulmonary Embolism Severity Index (PESI)Stratifies severity of pulmonary embolism from very low to very high risk.

Pulmonary Embolism Wells ScoreCalculates probability of pulmonary embolism.

Right to Left Shunt Fraction Qs/QtRight to left shunt fraction (Qs/Qt) calculator using temperature, altitude, paCO2 and paO2.

Simplified Pulmonary Embolism Severity Index (sPESI)Risk stratifies patients with PE and can help identify those suitable for outpatient management.

Systemic Vascular ResistanceCalculates systemic vascular resistance using cardiologic parameters.

Body Surface Area (Du Bois Method)Calculation of body surface area.

Body Surface Area (Mosteller, square root method)Calculation of body surface area.

Body Surface Area Based DosingCalculates drug dose based on body surface area.

Jones Criteria for Diagnosis of Rheumatic FeverDiagnostic criteria for rheumatic fever.

Osteoporosis Risk Assessment by Composite Linear Estimate (ORACLE score)Osteoporosis risk assessment score (age, BMI, hormone replacement, fracture history, ultrasound bone profile index).

Osteoporosis Risk SCORE (Simple Calculated Osteoporosis Risk Estimation)Osteoporosis risk assessment score (ancestry, rheumatoid arthritis, fracture history, age, hormone replacement, weight).

Rheumatoid arthritis Clinical Disease Activity Index (CDAI)Disease activity scoring system for rheumatoid arthritis.

Calcium Correction in Hypoalbuminemia (SI units)Calculates corrected calcium level for patients with hypoalbuminemia.

Child Pugh classification for severity of liver disease (SI units)Assesses severity of liver disease.

Conventional unit to SI unit conversions: Chemistry testsUnit conversions for chemistries.

Conventional unit to SI unit conversions: Immunology test valuesUnit conversions for immunology tests.

Creatinine clearance (measured)Measures creatinine clearance.

Creatinine clearance estimate by Cockcroft-Gault equation (SI units)Calculates creatinine clearance according to the Cockcroft-Gault equation.

CURB-65 pneumonia severity scorePredicts risk of mortality in community-acquired pneumonia.

Fractional Excretion of Sodium (SI units)Calculates fractional excretion of sodium, helping to assess acute kidney injury.

Friedewald Equation for Low Density Lipoprotein (LDL-C, SI units)Estimates concentration of LDL-C in plasma.

Glomerular Filtration Rate Estimate by Quadratic EquationEstimates glomerular filtration rate based on creatinine and patient's age and gender.

Glomerular Filtration Rate Estimate by the Abbreviated MDRD Study Equation (SI units)Estimates glomerular filtration rate based on creatinine and patient characteristics.

Glomerular Filtration Rate Estimate by the MDRD Equation (SI units)Estimates glomerular filtration rate based on creatinine and patient characteristics.

Osmolal Gap Calculator (SI units)Calculates osmolal gap to detect unmeasured compounds in serum (SI units).

SI Unit Conversions: Body Fluid ChemistriesSI unit conversions for multiple body fluid chemistries.

SI unit to conventional unit conversions: Chemistry and endocrine testsSI unit conversions for chemistries and endocrine tests.

SI unit to conventional unit conversions: Immunology test valuesUnit conversions for immunology tests.

Fracture Index WITH known Bone Mineral Density (BMD)Calculates risk of fracture based on factors including bone mineral density.

Fracture Index WITHOUT known Bone Mineral Density (BMD)Calculates risk of fracture based on factors not including bone mineral density.

Stroke Risk in Diabetes Type 2 UKPDS 60Models chance of a first stroke in type 2 diabetes using risk factors.

Burn Injury Fluid Resuscitation (Brooke estimate)Estimates fluid requirements following burn injury.

Burn Injury Fluid Resuscitation (Demling dextran estimate)Estimates colloid fluid requirements following burn injury.

Burn Injury Fluid Resuscitation (Evans estimate)Estimates fluid requirements following burn injury.

Burn Injury Fluid Resuscitation (Modified Brooke crystalloid estimate)Estimates fluid requirements following burn injury.

Burn Injury Fluid Resuscitation (Slater estimate)Estimates fluid requirements following burn injury.

Burn Injury Fluid Resuscitation, Adult (Parkland crystalloid estimate)Often used to estimate fluid requirements in adults following major burn injury.

Cardiac Risk Index for Non-AAA Vascular Surgery (Lee)Estimates risk of cardiac complications following vascular surgery (non-abdominal aortic aneurysm).

Cardiac Risk Index for Orthopedic Surgery (Lee)Estimates risk of cardiac complications following orthopedic surgery.

Cardiac Risk Index in Noncardiac Surgery (Detsky et. al.)Estimates risk of cardiac complications following noncardiac surgery.

Cardiac Risk Index in Noncardiac Surgery (Goldman, et. al.)Estimates risk of cardiac complications following noncardiac surgery.

Conventional unit to SI unit conversions: Chemistry testsUnit conversions for chemistries.

Conventional unit to SI unit conversions: Immunology test valuesUnit conversions for immunology tests.

EuroSCORE for Cardiac Surgery Risk Assessment (additive version)Calculates risk of mortality in patients undergoing cardiac surgery.

Gestational Age from Estimated Date of Delivery (EDD)Calculates gestational age based on estimated date of delivery.

Glasgow Blatchford Score for Gastrointestinal BleedingStratifies patients with upper GI bleed, identifying those who can be safely treated as outpatients.

Injury Severity Score (ISS)Assesses severity of traumatic injury.

Mangled Extremity Severity Score (MESS score)Estimates viability of an extremity after trauma.

New Orleans Head CT CriteriaCriteria for head CT after head trauma.

Norton Scale to Stratify Risk of Pressure SoresAssessment scale for risk of pressure ulcers.

Pancreatitis Prognosis CriteriaMortality scale for acute pancreatitis, based on criteria from admission to day 2 of hospitalization.

Pancreatitis Prognosis Criteria When Disease Due To GallstonesMortality scale for gallstone-related acute pancreatitis, based on criteria from admission to day 2 of hospitalization.

Predicted postoperative FEV1 following lung resection surgery (anatomic method)Predicted postoperative FEV1 after lung resection using lung anatomy.

Predicted postoperative FEV1 following lung resection surgery (perfusion method)Predicted postoperative FEV1 after lung resection using perfusion scan.

SI Unit Conversions: Body Fluid ChemistriesSI unit conversions for multiple body fluid chemistries.

SI unit to conventional unit conversions: Chemistry and endocrine testsSI unit conversions for chemistries and endocrine tests.

SI unit to conventional unit conversions: Immunology test valuesUnit conversions for immunology tests.

Venous Leg Ulcer Healing PredictionScore for venous leg ulcer healing in 24 weeks based on duration and area.

Apgar scoreAssesses neonates 1 and 5 minutes after birth.

Body Mass Index (BMI) percentiles for girls (2 to 20 years)Assesses whether patient is at a weight appropriate for their height, age, and gender.

Breast Cancer Recurrence Risk After Mastectomy (simple)Assesses risk of breast cancer recurrence after mastectomy based on tumor grade and lymphatic involvement.

Fracture Index WITH known Bone Mineral Density (BMD)Calculates risk of fracture based on factors including bone mineral density.

Fracture Index WITHOUT known Bone Mineral Density (BMD)Calculates risk of fracture based on factors not including bone mineral density.

Gail Model for 5 Year Risk of Breast Cancer (1999 paper)Estimates 5-year risk of breast cancer based on key risk factors.

Gail Model for 5 Year Risk of Breast Cancer in Black Women (2007)Estimates 5-year risk of breast cancer in black women.

Gestational Age from Estimated Date of Delivery (EDD)Calculates gestational age based on estimated date of delivery.

Irritable Bowel Syndrome Diagnostic Criteria (Manning Criteria)Diagnostic criteria for irritable bowel syndrome.

Osteoporosis Risk Assessment by Composite Linear Estimate (ORACLE score)Osteoporosis risk assessment score (age, BMI, hormone replacement, fracture history, ultrasound bone profile index).

Osteoporosis Risk Assessment Index (ORAI)Osteoporosis risk assessment index (age, body weight).

Osteoporosis Risk SCORE (Simple Calculated Osteoporosis Risk Estimation)Osteoporosis risk assessment score (ancestry, rheumatoid arthritis, fracture history, age, hormone replacement, weight).

Migraine With Aura Diagnostic CriteriaCriteria for migraine with aura.

Migraine Without Aura Diagnostic CriteriaCriteria for migraine without aura.

Oswestry Disability Index Version 1Disability index for low back pain based on questions in 10 areas of function.

Oswestry Disability Index Version 2Disability index for low back pain based on questions in 10 areas of function.

Roland-Morris Disability ScoreScoring for physical disability caused by low back pain.