Odds Ratio In An Unmatched Study Calculator

Posted by Dinesh on

This calculator calculates the odds ratio in an unmatched study using subjects with disease/outcome, subjects without disease/outcome values.

Odds Ratio In An Unmatched Study Calculation

Formula:

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

Where,

cases exposed (a); cases not exposed (c); controls exposed (b); controls not exposed (d)

Subjects with disease/outcome (cases) exposed (a)
not exposed (c)
Subjects without disease/outcome (controls) exposed (b)
not exposed (d)

Odds Ratio = (a/c) / (b/d) = ad /bc

An Odds Ratio of unity means that cases are no more likely to be exposed to the risk factor than controls.