KLK3 and neoplasm: Furthermore, the inverse probability of treatment weighting (IPTW)-adjusted Cox regression analysis, in which the potential confounders for BCR-FS (age, initial PSA, biopsy Gleason score, surgery type, year of surgery, pathological tumor stage, and surgical margin) were adjusted in both groups, showed that BCR-FS was not significantly different between the two groups (HR: 1.44; P = 0.469, Fig. 3b).