| ORa (95% CIb) | p-valued |
---|---|---|
Maternal age | 1.06 (1.03–1.08) | p < 0.001 |
Smoking | 0.79 (0.51–1.23) | p = 0.29 |
Alcohol use | 0.61 (0.41–0.90) | p = 0.014 |
Prepregnancy BMIc | ||
 Underweight (<  19) | 0.68 (0.34–1.36) | p = 0.27 |
 Normal weight (19–24.99) | Reference |  |
 Overweight (25–29.99) | 1.84 (1.27–2.68) | p = 0.001 |
 Obese (> = 30) | 3.67 (2.48–5.44) | p < 0.001 |
 Gestational weight gain | 0.99 (0.97–1.01) | p = 0.48 |
Parity | ||
 First child | Reference |  |
 Second child | 1.11 (0.78–1.59) | p = 0.55 |
 Third child | 1.28 (0.82–2.02) | p = 0.28 |
 Forth child and more | 0.92 (0.53–1.61) | p = 0.77 |
Education level | ||
 Low | Reference |  |
 Middle | 0.73 (0.46–1.16) | p = 0.19 |
 Mid-high | 0.65 (0.38–1.13) | p = 0.13 |
 High | 0.44 (0.23–0.83) | p = 0.01 |
 Income; thousand € | 0.62 (0.46–0.83) | p = 0.001 |