Table 5.
Birth characteristics and civil status by maternal age when giving birth and type of pregnancy a
| ART | Spontaneous | |||||||
|---|---|---|---|---|---|---|---|---|
| ≤39 | 40–44 | ≥45 | p-valueb | ≤39 | 40-44 | ≥45 | p-valueb | |
| n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | |||
| Civil status | < 0.001 | < 0.001 | ||||||
| Married/ cohabiting | 1859 (98.2) | 2651 (94.2) | 227 (91.2) | 62,200 (89.4) | 27,455 (84.2) | 1575 (79.5) | ||
| Single status at registration | 35 (1.8) | 162 (5.8) | 22 (8.8) | 7378 (10.6) | 5161 (15.8) | 405 (20.5) | ||
| Parity | < 0.001 | |||||||
| Primiparous | 872 (46.0) | 1318 (46.9) | 120 (48.2) | 0.754 | 14,788 (21.3) | 6099 (18.7) | 377 (19.0) | |
| Multiparous | 1022 (54.0) | 1495 (53.1) | 129 (51.8) | 54,790 (78.7) | 26,517 (81.3) | 1603 (81.0) | ||
| Twin | < 0.001 | < 0.001 | ||||||
| No | 1404 (74.1) | 2381 (84.6) | 170 (68.3) | 67,048 (96.4) | 31,675 (97.1) | 1863 (94.1) | ||
| Yes | 490 (25.9) | 432 (15.4) | 79 (31.7) | 2530 (3.6) | 941 (2.9) | 117 (5.9) | ||
| Gestational age | < 0.001 | < 0.001 | ||||||
| At term, 37–42 weeks | 1556 (82.2) | 2454 (87.2) | 190 (76.3) | 65,066 (93.6) | 30,223 (92.8) | 1787 (90.4) | ||
| Post term, > 42 weeks | 4 (0.2) | 11 (0.4) | 1 (0.4) | 241 (0.3) | 116 (0.4) | 7 (0.4) | ||
| Preterm, 32–36 weeks | 277 (14.6) | 284 (10.1) | 49 (19.7) | 3593 (5.2) | 1872 (5.7) | 138 (7.0) | ||
| Very preterm, < 32 weeks | 57 (3.0) | 64 (2.3) | 9 (3.6) | 623 (0.9) | 372 (1.1) | 45 (2.3) | ||
| Birthweight | < 0.001 | < 0.001 | ||||||
| Normal birthweight, ≥2500 g | 1614 (85.5) | 2526 (90.0) | 193 (77.8) | 66,533 (95.8) | 30,834 (94.8) | 1831 (92.6) | ||
| Low birthweight, 1500 g-2499 g | 230 (12.2) | 228 (8.1) | 45 (18.1) | 2403 (3.5) | 1330 (4.1) | 108 (5.5) | ||
| Very low birthweight, < 1500 g | 44 (2.3) | 52 (1.9) | 10 (4.0) | 490 (0.7) | 1330 (1.1) | 38 (1.9) | ||
| Size for gestational age | 0.255 | < 0.001 | ||||||
| AGA1 | 1788 (94.4) | 2637 (93.7) | 226 (90.8) | 65,319 (93.9) | 30,073 (92.2) | 1826 (92.2) | ||
| SGA2 | 42 (2.2) | 72 (2.6) | 10 (4.0) | 1239 (1.8) | 915 (2.8) | 53 (2.7) | ||
| LGA3 | 64 (3.4) | 104 (3.7) | 13 (5.2) | 3020 (4.3) | 1628 (5.0) | 101 (5.1) | ||
aNumbers may not add up to the total due to partially missing data
bPearson’s chi-square
1Appropriate for gestational age
2Small for gestational age
3Large for gestational age