E-value Calculator

Calculate the E-value to assess sensitivity to unmeasured confounding

The E-value quantifies the minimum strength of association that an unmeasured confounder would need to have with both the treatment and the outcome to fully explain away the observed association.

Input Parameters

Select the type of effect measure from your study
Enter the observed risk ratio, odds ratio, or hazard ratio from your study
Enter the confidence interval limit closest to the null (usually the lower limit for ratios > 1)

Calculated E-values

E-value for Point Estimate:
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E-value for Confidence Interval:
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E-value = RR + √(RR × (RR - 1))

Interpretation

Enter an observed effect measure to see the interpretation of the E-value.