Use this calculation to reproduce a defined quantitative method when the observations, units, sampling process, and assumptions match the method shown here.

Exposed events

Required integer.

Exposed non-events

Required integer.

Control events

Required integer.

Control non-events

Required integer.

The cited overview of Odds ratio supplies background for the terminology and domain context used by this tool.^[1]

Calculate an odds ratio from a two-by-two contingency table. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Odds ratio

Returned number.

• A numerical result does not by itself establish data quality, causation, representativeness, independence, distributional fit, or practical significance.
• Exposed events must be at least 0.
• Exposed non-events must be at least 0.
• Control events must be at least 0.
• Control non-events must be at least 0.
• Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.

Inspect the underlying data, visualize its distribution, report uncertainty and sample size, and compare the result with a robust or domain-specific method where appropriate.

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  Calculate the Mann-Whitney U statistic for two independent samples using average ranks for ties.