Figure 2

The impact of baseline risk (R ₀₀ and interaction magnitude on the discrepancy between the attributable proportion due to interaction calculated using risk ratios (AP) and that calculated using odds ratios (APF). Each curve represents a specific value of AP and changes on the vertical scale represent the magnitude of the discrepancy. Interaction scenarios: Less than additive; AP = 5 and -1; Exactly additive: AP = 0; More than additive and less than multiplicative AP = 0.14; Exactly multiplicative: AP = 0.25; More than additive and more than multiplicative: AP = 0.40 and 0.57 (These correspond to the ICR values depicted in Figure 1).