KLK3 and obesity due to melanocortin 4 receptor deficiency: Table 3 showed a correlation between age, BMI and PSA levels, where the OR of age was 2.67 with 95%CI (2.24, 3.1), indicating that PSA increases with age, and with BMI (OR of overweight=17.52 with 95%CI (7.65, 26.32), OR of obesity=10.36 with 95%CI (0.68, 20.18)).