StatsApps

Odds Ratio

The odds ratio (OR) is a measure of the strength of the association between two categorical variables.

Resources

  1. Calculator for odds ratios:

    Odds Ratio Calculator

    This web calculator allows users to specify the number of subjects in the "exposed" and "control" groups with positive and negative outcomes. After providing the data, the calculator will show a table of the odds ratio value, 95% confidence interval, z-statistic and significance level. The calculator includes explanations of the formulas.

    Author: © 2022 MedCalc Software Ltd.

  2. Calculator for confidence interval for an odds ratio:

    Confidence Interval for Odds Ratio Calculator

    This web calculator allows users to specify the confidence level, presence number, and absence group of properties A and B. After finishing the steps, the calculator will show a table giving the odds ratio value and confidence interval. Also, a table of alternative scenarios with different confidence levels is presented. The calculator includes explanations of the formulas.

    Author: © 2022 Select Statistical Services Limited. All Rights Reserved.