TPO and polycystic ovary syndrome: There also appeared to be statistically significant differences in the mean levels of TPO-Ab or TG-Ab, which were higher in the PCOS-AITD group than in the PCOS group [TPO-Ab—289.19 IU/mL vs. 0.48 IU/mL; (p < 0.001; d Cohen’s = −0.837); TG-Ab—140.73 IU/mL vs. 1.7 IU/mL; (p = 0.003; d Cohen’s = −0.319)].