In the remaining 100 men with PCa, their median age, body mass index (BMI), and PSA was 65 (inter-quartile range [IQR]:8) (non-PCa: 61 [8]; p < 0.001, Mann–Whitney U test) years old, 24.93 (IQR: 3.51) (non-PCa: 25.1 [3.87]; p = 0.892, Mann–Whitney U test) kg/m2, and 9.60 (IQR: 4.09) (non-PCa: 7.14 [3.66]; p = 0.001, Mann–Whitney U test) ng/mL, respectively. Here, KLK3 is linked to posterior cortical atrophy.