| No. of previous births/pregnancies | Number of previous births | No. of previous pregnancies OR (95% CI) | ||
|---|---|---|---|---|
| Maternal age, N; mean (SD) | GDM, n (%) | No GDM, n (%) | ||
| 0 | 219,205; 27.1 (6.3) | 4060 (1.85) | 215,145 (98.15) | 1.00 |
| 1 | 174,021; 29.6 (5.7) | 3578 (2.06) | 170,443 (97.94) | 1.11 (1.06–1.16) |
| 2–3 | 117,028; 31.2 (5.4) | 2680 (2.29) | 114,348 (97.71) | 1.24 (1.18–1.31) |
| 4–6 | 28,352; 33.2 (5.0) | 1017 (3.59) | 27,335 (96.41) | 1.97 (1.84–2.11) |
| > 7 | 3665; 36.4 (4.3) | 169 (4.61) | 3496 (95.39) | 2.57 (2.19–3.00) |
| Missing data | 1814 (3.08) | 57,018 (96.9) | ||
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