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Odds Ratio Calculator

  Test Positive Test Negative
Disease Present
Disease Absent

  Test Positive False Positive
Disease Present
a
b
Disease Absent
c
d

Odds Ratio = (a/b)/(c/d)

The odds ratio can be used to compare the chance of an event in one group versus the chance in another group.

Sources:
NMS Review for USMLE Step 2 CK Third Edition
Odds Ratios
Wikipedia - Odds Ratio
What's the Relative Risk?


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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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