Maternal age at conception |
<25 | 1639 | 9.3 | 85 | 17.2 | 31 | 17.5 | 173 | 11.0 | 103 | 6.2 |
25–29 | 7433 | 42.4 | 218 | 44.2 | 68 | 38.4 | 712 | 45.3 | 843 | 50.6 |
30–34 | 6730 | 38.4 | 144 | 29.2 | 65 | 36.7 | 520 | 33.1 | 558 | 33.5 |
35+ | 1729 | 9.9 | 46 | 9.3 | 13 | 7.3 | 167 | 10.6 | 161 | 9.7 |
Gravidity |
0 | 5529 | 31.5 | 137 | 27.8 | 45 | 25.4 | 549 | 34.9 | 564 | 33.9 |
1 | 6690 | 38.2 | 168 | 34.1 | 64 | 36.2 | 547 | 34.8 | 564 | 33.9 |
2+ | 5306 | 30.3 | 188 | 38.1 | 68 | 38.4 | 476 | 30.3 | 535 | 32.1 |
Missing | 6 | 0.0 | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 | 2 | 0.1 |
BMI |
<18.5 | 708 | 4.0 | 16 | 3.2 | 8 | 4.5 | 62 | 3.9 | 61 | 3.7 |
18.5–30 | 15350 | 87.6 | 421 | 85.4 | 145 | 81.9 | 1364 | 86.8 | 1480 | 88.9 |
>30 | 1214 | 6.9 | 48 | 9.7 | 20 | 11.3 | 120 | 7.6 | 112 | 6.7 |
Missing | 259 | 1.5 | 8 | 1.6 | 4 | 2.3 | 26 | 1.7 | 12 | 0.7 |
Smoking |
No | 13693 | 78.1 | 346 | 70.2 | 105 | 59.3 | 1161 | 73.9 | 1293 | 77.7 |
Yes | 3835 | 21.9 | 147 | 29.8 | 72 | 40.7 | 410 | 26.1 | 371 | 22.3 |
Missing | 3 | 0.0 | 0 | 0.0 | 0 | 0.0 | 1 | 0.1 | 1 | 0.1 |
Alcohol consumption |
None | 1864 | 10.6 | 71 | 14.4 | 30 | 16.9 | 162 | 10.3 | 143 | 8.6 |
0.5–7 | 14170 | 80.8 | 391 | 79.3 | 133 | 75.1 | 1268 | 80.7 | 1395 | 83.8 |
7.5+ | 1419 | 8.1 | 29 | 5.9 | 14 | 7.9 | 137 | 8.7 | 122 | 7.3 |
Missing | 78 | 0.4 | 2 | 0.4 | 0 | 0.0 | 5 | 0.3 | 5 | 0.3 |
Occupation, mother |
Managers and professionals | 3785 | 21.6 | 15 | 3.0 | 7 | 4.0 | 299 | 19.0 | 259 | 15.6 |
Technicians | 5117 | 29.2 | 176 | 35.7 | 49 | 27.7 | 631 | 40.1 | 1077 | 64.7 |
(Nurses)* | 321 | | 146 | | 36 | | 259 | | 862 | |
Service and sales workers | 7465 | 42.6 | 234 | 47.5 | 81 | 45.8 | 530 | 33.7 | 278 | 16.7 |
(Nursing assistants)* | 521 | | 137 | | 43 | | 106 | | 92 | |
Industrial workers | 1164 | 6.6 | 68 | 13.8 | 40 | 22.6 | 112 | 7.1 | 51 | 3.1 |
Occupation, father |
Managers and professionals | 5204 | 29.7 | 94 | 19.1 | 26 | 14.7 | 458 | 29.1 | 541 | 32.5 |
Technicians | 3313 | 18.9 | 72 | 14.6 | 24 | 13.6 | 278 | 17.7 | 334 | 20.1 |
Service and sales workers | 2244 | 12.8 | 76 | 15.4 | 30 | 16.9 | 195 | 12.4 | 205 | 12.3 |
Industrial workers | 5529 | 31.5 | 209 | 42.4 | 80 | 45.2 | 458 | 29.1 | 435 | 26.1 |
No job | 754 | 4.3 | 26 | 5.3 | 10 | 5.6 | 126 | 8.0 | 105 | 6.3 |
Missing | 487 | 2.8 | 16 | 3.2 | 7 | 4.0 | 57 | 3.6 | 45 | 2.7 |
Working hours per week |
<35 | 4110 | 23.4 | 389 | 78.9 | 109 | 61.6 | 455 | 28.9 | 467 | 28.0 |
35+ | 13397 | 76.4 | 101 | 20.5 | 68 | 38.4 | 1105 | 70.3 | 1187 | 71.3 |
Missing | 24 | 0.1 | 3 | 0.6 | 0 | 0.0 | 12 | 0.8 | 11 | 0.7 |
Number of night shifts per month |
1–8 | | | | | 11 | 6.2 | | | 1555 | 93.4 |
9+ | | | | | 162 | 91.5 | | | 99 | 5.9 |
Missing | | | | | 4 | 2.3 | | | 11 | 0.7 |