KLK3 and neoplasm: According to the multivariate Cox regression analysis, age, initial prostate-specific antigen (PSA), year of surgery, pathological tumor stage, and surgical margin were independent prognostic factors for BCR-FS (HR: 0.95, 1.02, 2.46, 2.49, and 2.06, respectively), whereas PLND was not (Table 3).