Table 1 Maternal sociodemographic characteristics and perinatal outcomes according to the NPR registration status
n(%) | NPR registration N = 854,689 | No NPR registration N = 16,594 | Relative prevalence (% in NPR-unregistered / %in NPR-registered) |
|---|---|---|---|
% of births | 98.1 | 1.9 | |
Parity | |||
Nulliparity | 371,179 (43.8) | 7513 (46) | 1.05 |
1–2 | 404,531 (47.7) | 7346 (45) | 0.95 |
≥ 3 | 71,988 (8.5) | 1464 (9.0) | 1.06 |
missing | 0,8% | 1.6% | |
Living alone | |||
Yes | 103,633 (12.3) 1.4% | 5311 (33.7) | 2.74 |
missing | 4.9% | ||
Maternal age (years) | |||
≥ 40 | 15,324 (1.8) | 429 (2.6) | 1.44 |
20 < 40 | 815,185 (95.45) | 14,990 (90.45) | 0.95 |
< 20 | 23,497 (2.75) | 1151 (6.95) | 2.53 |
missing | 0.08% | 0.1% | |
Maternal education | |||
≤ primary | 40,517 (4.7) | 1893 (11.4) | 2.41 |
secondary) | 369,011 (43.2) | 6448 (38.9) | 0.90 |
tertiary | 339,370 (39.7) | 4307 (26) | 0.65 |
Other/ Unknown | 105,791 (12.4) | 3946 (23.8) | 1.92 |
Number of incomes | |||
0 incomes | 104,200 (13.2) | 4822 (36.4) | 2.76 |
1 income | 197,341 (25.1) | 3303 (25.0) | 1.00 |
2 incomes | 485,717 (61.7) | 5108 (38.6) | 0.63 |
missing | 7.9% | 20.2% | |
Nationality | |||
Belgium | 663,539 (77.6) | 3107 (18.7) | 0,24 |
EU15 | 54,895 (6.4) | 4239 (25.5) | 3,98 |
EU27 without EU15 | 27,724 (3.2) | 2324 (14.0) | 4,38 |
Eastern Europe | 13,754 (1.6) | 1430 (8.6) | 5,38 |
Turkey | 8212 (0.96) | 228 (1.4) | 1,46 |
Maghreb | 33,570 (3.9) | 1316 (7.9) | 2,03 |
Sub-Saharan Africa | 24,932 (2.9) | 1445 (8.7) | 3,00 |
South America | 4200 (0.5) | 816 (4.9) | 9.80 |
Middle east and North/West Asia | 10,546 (1.2) | 584 (3.5) | 2.92 |
Other | 10,580 (1.2) | 623 (3.75) | 3.13 |
Unknown | 2737 (0.3) | 482 (2.9) | 9.67 |
Congenital anomalies | |||
Yes | 5892 (0.7) | 316 (1.9) | 2.76 |
missing | 1.8% | 1.6% | |
Hypertension | |||
Yes | 37,638 (4.5) | 656 (4.1) | 0.91 |
missing | 2.1% | 3.7% | |
Diabetes | |||
Yes | 43,960 (5.3) | 958 (6.1) | 1.15 |
missing | 2.5% | 5.6% | |
Mode of delivery | |||
Vaginal | 672,570 (80.2) | 12,664 (77.7) | 0.97 |
Planned caesarean | 84,184 (10.0) | 1699 (10.4) | 1.04 |
Emergency caesarean | 81,834 (9.8) | 1928 (11.8) | 1.20 |
missing | 1.9% | 1.8% | |
Perinatal mortality | |||
Yes | 5311 (0.62) | 334 (2.01) | 3.24 |
Stillbirth | |||
Yes | 4170 (0.49) | 193 (1.16) | 2.37 |
Birth weight | |||
< 2500 g | 46,061 (5.5) | 1491 (9.0) | 1.65 |
2500 < 4000 g | 727,578 (86.4) | 13,836 (83.8) | 0.97 |
≥ 4000 g | 68,757 (8.2) | 1188 (7.2) | 0.88 |
missing | 1.4% | 0.5% | |
Prematurity | |||
< 37 | 55,771 (6.6) | 1742 (10.6) | 1.61 |
missing | 1.4% | 0.6% | |
Apgar 5 min | |||
< 7 | 16,576 (1.97) | 744 (4.5) | 2.28 |
missing | 1.5% | 0.9% |