KLK3 and posterior cortical atrophy: Among the benign and PCa groups, the age, total prostate specific antigen (T-PSA), free prostate specific antigen (F-PSA), and PI in the PCa group were higher than those in the benign group (P < 0.05), and the F/T and TTP of the PCa group were lower than those of the benign group (P < 0.05), as shown in Supplementary Material.