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Deaths from lung cancer. Kaplan–Meier cumulative hazards for death from lung cancer are presented by study group and time in the trial. The hazard ratio (HR), 95% confidence interval (CI), and P values were from Cox proportional hazards regression models, stratified by age, previous lung cancer, and randomization assignment in the dietary modification trial. All statistical tests were two-sided. CEE = conjugated equine estrogen.
