Sensitivity and Specificity Calculator
Sensitivity and specificity are terms used to describe the value of tests. This calculator will determine these values based on true positives, false positives, true negatives, and false negatives.

  Disease No Disease
Positive test
Negative test

  Disease No Disease
Positive test
Negative test

Sensitivity = a/(a+c)
Specificity = d/(b+d)
Positive Predictive Value = a/(a+b)
Negative Predictive Value = d/(c+d)

a = True Positive
b = False Positive
c = False Negative
d = True Negative

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About the site and its author: Joseph K. Sunny, Jr. MD. Most of the pages are created from my reading or clinical experience.

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