Figure 1From: The fallacy of enrolling only high-risk subjects in cancer prevention trials: Is there a "free lunch"?Data from the tamoxifen prevention trial. See text for a description of groups. Horizontal lines are estimates and 95% confidence intervals for model for constant absolute risk difference per 1000 (RD) or relative risk (RR). P-values correspond to likelihood ratio tests comparing the models with varying and constant risk difference or relative risks.Back to article page