3 calculators in this category
- Sensitivity & Specificity CalculatorWilson score interval; STARD 2015 reporting guidelineEnter the four counts of a diagnostic 2×2 table — true positives, false positives, false negatives and true negatives — and…
- PPV & NPV CalculatorBayes' theorem; STARD 2015 reporting guidelinePositive predictive value answers the only question a patient actually asks: my test came back positive — what is the chance I…
- Diagnostic Likelihood Ratio CalculatorBayes' theorem in odds form (Fagan nomogram)A likelihood ratio tells you how much a test result should move your belief, in a form that does not depend on how common the…
Which one do you need?
- Sensitivity & Specificity Calculator
- Compute sensitivity, specificity, accuracy and the Youden index from a diagnostic 2x2 table, each with a Wilson score confidence interval and error rates.
- PPV & NPV Calculator
- Calculate positive and negative predictive value from a 2x2 table or from sensitivity, specificity and prevalence using Bayes' theorem, with a prevalence sweep.
- Diagnostic Likelihood Ratio Calculator
- Calculate positive and negative likelihood ratios from sensitivity and specificity, then convert a pre-test probability into post-test probability numerically.