SHBG and polycystic ovary syndrome: According to BMI, the PCOS group showed an increase in FAI scores and a decreasing SHBG level, progressively from normal BMI to overweight (P = 0.041 and P < 0.001, respectively), from normal BMI to obese (P < 0.001, both), and overweight to obese (P = 0.036 and P = 0.026, respectively), with significant differences between them (P < 0.001, both).