| PCOS(−) Metformin(−) | PCOS(−) Metformin(+) | PCOS(+) Metformin(−) | PCOS(+) Metformin(+) | PCOS(−) Metformin(+) | PCOS(+) Metformin(−) | PCOS(+) Metformin(+) | PCOS(−) Metformin(+) | PCOS(+) Metformin(−) | PCOS(+) Metformin(+) |
---|---|---|---|---|---|---|---|---|---|---|
 | Number (%) | Crude, HR (95% CI) | Adjusted, HR (95% CI)a | |||||||
 | 991,019 | 864 | 21,385 | 347 |  |  |  |  |  |  |
Obesity | ||||||||||
 Yes | 7589 (0.77) | 19 (2.2) | 319 (1.49) | 6 (1.73) | 4.03 (2.57–6.31) | 2.37 (2.11–2.66) | 2.48 (1.12–5.49) | 1.67 (1.05–2.65) | 1.61 (1.44–1.81) | 1.13 (0.51–2.53) |
 No | 983,430 (99.23) | 845 (97.8) | 21,066 (98.51) | 341 (98.27) |  |  |  |  |  |  |