KLK3 and posterior cortical atrophy: Based on this equation, the regression model obtained the reflected number of newly detected PCa cases in each age subgroup.Y^i=α+β1(PSAi)+β2(EPi) * i = age group (40s and under, aged in the 50s, aged in the 60s, aged in the 70s, aged in the 80s); * PSA = PSA testing rate; * EP = estimated population.