KLK3 and neoplasm: Propensity score matching based on tumor stage (pT2 vs. pT3-4), Gleason score (GS ≤ 7 vs. GS8-10), PSA at time of sRT (<0.5 vs. ≥0.5 ng/ml) and radiation dose (<70 vs. ≥70 Gy) resulted in 95 patient pairs.