|  | Studies, n | OR a (95% CI) | I2 (%) | Heterogeneity |
---|---|---|---|---|---|
 |  |  |  |  | 0.40 |
Diagnostic criteria for PCOS | Rotterdam criteria | 13 | 2.19 (1.88–2.55) | 13.2 | 0.312 |
 | no Rotterdam criteriab | 3 | 3.31 (1.89–5.82) | 0 | 0.446 |
Diagnosis for NAFLD | ultrasonography | 15 | 2.29 (1.96–2.67) | 12.9 | 0.309 |
BMI | Non-obese subjectsc | 3 | 2.07 (1.12–3.85) | 0 | 0.680 |
 | obese subjects | 5 | 3.01 (1.88–4.82) | 0 | 0.705 |
Androgen levels | HA | 3 | 3.31 (2.58–4.24) | 0 | 0.543 |
 | Non- HA | 3 | 1.46 (0.55–3.87) | 83.3 | 0.002 |
Geographic region | Asia-Pacific | 5 | 2.32 (1.89–2.84) | 36.4 | 0.178 |
 | America | 5 | 2.96 (1.93–4.55) | 0 | 0.760 |
 | Europe | 7 | 2.00 (1.58–2.52) | 3.9 | 0.396 |