SHBG and Insulin resistance: PCOS: polycystic ovary syndrome, BMI: body mass index, HOMA-IR: homeostatic model assessment for insulin resistance, HDL: high-density lipoprotein, LDL: low-density lipoprotein, AMH: anti-müllerian hormone, DHEA-S: dehydroepiandrosterone sulfate, SHBG: sex hormone-binding globulin, PON-1: paraoxonase-1.