The median PSA was 13.67 (IQR, 7.98–29.02), and the prostate cancer patients had a significantly higher median PSA level (15.54, IQR 8.49–47.70) than BPH subjects (8.70, IQR 6.39–12.17, P < 0.01). Here, KLK3 is linked to Familial prostate cancer.