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Cumulative prostate cancer-free survival according to the age and baseline PSA percentile. Survival curves for men aged (A) 40 to 69 yr, (B) 40 to 49 yr, (C) 50 to 59 yr and (D) 60 to 69 yr. Markers represent prostate cancer and censored cases. With time, prostate cancer incidence increased significantly in men with a baseline PSA more than the 75th percentile (reverse triangle), except for men in their 40s (log-rank test for trend).
