TABLE 1.
Maternal and pregnancy characteristics in 2016–2019 and 2020 for 20 680 singleton births in Iceland.
|
2016–2019 (n = 16 280) |
2020 (n = 4400) |
|
|---|---|---|
| Maternal age, mean ± SD | 29.9 ± 5.3 | 30.0 ± 5.1 |
| Gestational age, mean ± SD | 39.3 ± 1.8 | 39.3 ± 1.8 |
| Parity, n (%) | ||
| Primipara | 7023 (43.1) | 2110 (48.0) |
| Multipara | 9357 (56.9) | 2290 (52.1) |
| Missing | 0 | 0 |
| Country of origin, n (%) | ||
| Iceland | 13 824 (84.9) | 3648 (82.9) |
| Other | 2456 (15.1) | 752 (17.1) |
| Missing | 0 | 0 |
| Residential area, n (%) | ||
| Capital area | 10 674 (65.6) | 2893 (65.8) |
| Outside capital area | 5606 (34.4) | 1507 (34.2) |
| Missing | 0 | 0 |
| Cohabitation, n (%) | ||
| Yes | 13 331 (81.9) | 3341 (75.9) |
| No | 2018 (12.4) | 400 (9.1) |
| Missing | 931 (5.7) | 659 (15.0) |
| Employment, n (%) | ||
| Employed | 12 560 (77.2) | 3248 (73.8) |
| Student | 1645 (10.1) | 432 (9.8) |
| Disability pension | 276 (1.7) | 64 (1.5) |
| Homemaker | 449 (2.8) | 94 (2.1) |
| Unemployed | 389 (2.4) | 184 (4.2) |
| Missing | 961 (5.9) | 378 (8.9) |
| Essential hypertension, n (%) | ||
| Yes | 233 (1.4) | 44 (1.0) |
| No | 16 047 (98.6) | 4356 (99.0) |
| Missing | 0 | 0 |
| Pre‐existing diabetes mellitus, n (%) | ||
| Yes | 122 (0.8) | 30 (0.7) |
| No | 16 158 (99.2) | 4370 (99.3) |
| Missing | 0 | 0 |
| Hypertensive disorders in pregnancy, n (%) | ||
| Yes | 1139 (7.0) | 369 (8.4) |
| No | 15 141 (93.0) | 4031 (91.6) |
| Missing | 0 | 0 |
| Gestational diabetes, n (%) | ||
| Yes | 2464 (15.1) | 722 (16.4) |
| No | 13 816 (84.9) | 3678 (83.6) |
| Missing | 0 | 0 |
| Fetal growth restriction, n (%) | ||
| Yes | 277 (1.7) | 80 (1.8) |
| No | 16 003 (98.3) | 4320 (98.2) |
| Missing | 0 | 0 |
| Birthweight (g), n (%) | ||
| ≥2500 | 15 780 (96.9) | 4276 (97.2) |
| <2500 | 500 (3.1) | 124 (2.8) |
| Missing | 0 | 0 |