Third-Variable Evaluator

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Part 1: The 10% Rule (Testing for Confounding)

Enter the Odds Ratios from your Crude and Adjusted logistic regression models. The tool will calculate the percentage change to determine if the third variable is a meaningful confounder.

Crude OR (Unadjusted)

Adjusted OR (with Confounder)

Part 2: Interaction Term (Testing Effect Modification)

Enter the Interaction OR and its p-value from your R regression output (`glm(Y ~ X * M)`).

Interaction Term OR

Interaction p-value