PLOD1 and polycystic ovary syndrome: PCOS patients had higher levels of BMI (P < 0.001), TT (P < 0.001), AD (P < 0.001), DHEA-S (P = 0.002), FAI (P < 0.001), LH (P < 0.001) and FSH (P = 0.039) and lower levels of SHBG (P < 0.001) than the control group.