TPO and polycystic ovary syndrome: The women with PCOS who were BMI-matched with the controls also had higher anti-TPO levels (SMD 0.31, 95% CI: [0.12–0.50], p = 0.001), although the difference was even more pronounced in the BMI-not matched women (SMD 0.82, 95% CI: [0.45–1.18], p < 0.0001).