Reference	PCOS diagnosis criteria	Age(PCOS vs. control) (y)	BMI(PCOS vs. control) (kg/m2)
Emekci Ozay, et al. (26)	Rotterdam	23.99 ± 4.63 vs. 24.43 ± 4.39	24.32 ± 3.40 vs. 23.44 ± 4.08
Albalawi et al. (25)	Oligomenorrhoea and abnormaL ovary	29.4 ± 3.93 vs. 26.7 ± 3.6*	46.04 ± 7.3 vs. 36.6 ± 8.17*
Chen et al. (22)	Rotterdam	18.6 ± 0.68 vs. 17.89 ± 1.24	20.11 ± 2.31 vs. 21.46 ± 4.60
Daghestani (27)	Rotterdam	24.05 ± 4.41 vs. 25.43 ± 4.80	22.84 ± 1.52 vs. 22.12 ± 1.48
Gorkem et al. (23)	Rotterdam	27.76 ± 4.65 vs. 27.92 ± 4.67	26.34 ± 4.69 vs. 26.06 ± 5.39
Jeon et al. (28)	Rotterdam	23.88 ± 4.86 vs. 24.92 ± 2.94	20.23 ± 2.19 vs. 19.77 ± 1.51*
Nyagolova et al. (29)	Rotterdam	24.99 ± 0.49 vs. 26.65 ± 0.71	25.59 ± 0.65 vs. 24.88 ± 0.89
Panidis et al. (24)	Chronic anovulation and hyperandrogenemia	24.30 ± 1.18 vs. 26.85 ± 1.06	33.02 ± 0.56 vs. 32.13 ± 1.85
Yilmaz et al. (30)	Rotterdam	21 (17-25, 25-36) vs. 24.5 (17-25, 25-37)*	24.5 (18.1–34.8) vs. 23.1 (18–34.8)
Kaya et al. (31)	Rotterdam	28.75 ± 3.49 vs. 30.25 ± 4.66	28.6 ± 5.08 vs. 26.4 ± 3.32
Lee et al. (32)	Rotterdam	\	\
Umayal et al. (33)	\	\	\