Table 1 Characteristics of women and pregnancies in Sweden, 2003–2019.
N of pregnancies | % of pregnancies | ||
|---|---|---|---|
Total | 1 799 010 | 100.0 | |
Country of birth | Sweden | 1 374 164 | 76.4 |
Europe | 132 137 | 7.3 | |
Other | 292 709 | 16.3 | |
Before pregnancy: | |||
Region of residence | South | 409 895 | 22.8 |
Central | 1 105 329 | 61.4 | |
North | 283 786 | 15.8 | |
Educational level, years | <10 | 187 580 | 10.4 |
10–12 | 668 109 | 37.1 | |
≥13 | 875 293 | 48.7 | |
Unknown | 68 028 | 3.8 | |
Smokinga | No | 1 446 826 | 80.4 |
1–9 cigarettes per day | 130 278 | 7.2 | |
≥10 cigarettes per day | 128 589 | 7.1 | |
Unknown | 93 317 | 5.2 | |
During pregnancy: | |||
Civil status | Cohabitated | 1 681 634 | 93.5 |
Non-cohabitated | 117 376 | 6.5 | |
Parity | 0 | 790 911 | 44.0 |
1 | 665 258 | 37.0 | |
2 | 239 187 | 13.3 | |
≥3 | 103 654 | 5.8 | |
BMI, kg/m2 | <18.5 | 39 531 | 2.2 |
18.5 to < 25 | 975 159 | 54.2 | |
25 to < 30 | 428 486 | 23.8 | |
≥30 | 199 035 | 11.1 | |
Unknown | 156 799 | 8.7 | |
Multiple gestation | Yes | 25 677 | 1.4 |
No | 1 773 333 | 98.6 | |
Hypertensive disease | No | 1 734 687 | 96.4 |
Essential hypertension | 11 270 | 0.6 | |
Preeclampsia | 53 053 | 2.9 | |
Diabetes | No | 1 762 896 | 98.0 |
Gestational diabetes | 24 834 | 1.4 | |
Pregestational diabetes | 11 280 | 0.6 | |
At delivery: | |||
Age, years | Mean and SD | 31.86 | 5.16 |
<20 | 24 139 | 1.3 | |
20–24 | 218 898 | 12.2 | |
25–29 | 543 459 | 30.2 | |
30–34 | 623 754 | 34.7 | |
35–39 | 318 371 | 17.7 | |
≥40 | 70 389 | 3.9 | |
Calendar year | 2003–2005 | 288 785 | 16.1 |
2006–2010 | 522 092 | 29.0 | |
2011–2015 | 542 653 | 30.2 | |
2016–2019 | 445 480 | 24.8 | |
Season at start of follow-up | Spring (Mar to May) | 475 882 | 26.5 |
Summer (June to Aug) | 478 656 | 26.6 | |
Autumn (Sept to Nov) | 427 622 | 23.8 | |
Winter (Dec to Feb) | 416 850 | 23.2 | |
Birth weight, grams | ≥2500 | 1 728 337 | 96.1 |
1500 to < 2500 | 54 787 | 3.0 | |
<1500 | 13 414 | 0.7 | |
Unknown | 2 472 | 0.1 | |
Gestational length, weeks | <32 | 15 821 | 0.9 |
32–36 | 81 313 | 4.5 | |
37–41 | 1 578 980 | 87.8 | |
≥42 | 122 382 | 6.8 | |
Unknown | 514 | 0.0 | |
Mode of delivery | Cesarean section | 309 274 | 17.2 |
Assisted vaginal delivery | 122 717 | 6.8 | |
Unassisted vaginal delivery | 1 367 019 | 76.0 | |
