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Time to first colorectal cancer in participants randomly assigned to aspirin compared with those assigned to aspirin placebo
(A) Kaplan-Meier analysis, adjusted for sex. (B) Kaplan-Meier analysis restricted to participants who had taken the intervention for 2 years or more, adjusted for sex. Each point on the plots shows the estimated cumulative incidence by years of follow-up; error bars show 95% CIs. HR=hazard ratio. CRC=colorectal cancer.
