No statistically significant differences were observed between the MetS-group and the non-MetS-group regarding age (64.92 ± 4.87 years vs 64.05 ± 6.53 years; p = 0.473), serum PSA levels (10.80 ± 16.75 ng/ml vs 10.41 ± 12.28 ng/ml; p = 0.687) and prostate volume (53.4 ± 24.01 ml vs 55.43 ± 34 ml; p = 0.661). Here, KLK3 is linked to metabolic syndrome.