Table 2. Perinatal characteristics of the population according to the neighbourhood deprivation index.
| Neighbourhood deprivation index | |||||
|---|---|---|---|---|---|
| Perinatal characteristics | Q1 | Q2 | Q3 | Q4 | p |
| Least deprived | Most deprived | ||||
| (n = 11,845) | (n = 9702) | (n = 9218) | (n = 12,544) | ||
| Maternal data | |||||
| Maternal age, n (%) | <0.001 | ||||
| < 25 y | 2174 (18.3) | 2222 (22.9) | 2653 (28.8) | 3732 (29.7) | |
| 25–30 y | 2892 (24.4) | 2720 (28) | 2293 (24.9) | 3457 (27.5) | |
| 30–35 y | 4036 (34.1) | 2867 (29.5) | 2491 (27) | 3055 (24.3) | |
| ≥ 35 y | 2743 (23.1) | 1893 (19.5) | 1781 (19.3) | 2300 (18.3) | |
| Obesity, n (%) | 205 (1.7) | 444 (4.6) | 570 (6.2) | 889 (7.1) | <0.001 |
| Multiparity*, n (%) | 4857/9147 | 4034/7241 | 3877/6527 (59.4) | 5904/8943 (66) | <0.001 |
| (53.1) | (55.1) | ||||
| Gestational diabetes mellitus, n (%) | 475 (4) | 573 (5.9) | 633 (6.9) | 1113 (8.9) | <0.001 |
| Preeclampsia, n (%) | 170 (1.4) | 192 (1.9) | 168 (1.8) | 247 (1.9) | 0.005 |
| Maternal smoking, n (%) | 92 (0.8) | 188 (1.9) | 175 (1.9) | 174 (1.4) | <0.001 |
| Caesarean delivery, n (%) | 2146 (18.1) | 1957 (20.2) | 1893 (20.5) | 2639 (21) | <0.001 |
| Neonatal data | |||||
| GA, mean (SD) | 39.20 (1.5) | 39.13 (1.6) | 39.16 (1.6) | 39.08 (1.7) | <0.001 |
| BW, mean (SD) | 3372 (449) | 3365 (467) | 3378 (458) | 3379 (489) | 0.33 |
| Preterm birth, n (%) | 546 (4.6) | 501 (5.1) | 425 (4.6) | 684 (5.4) | < 0.01 |
| Sex (female), n (%) | 5666 (47.8) | 4672 (48.1) | 4453 (48.3) | 6073 (48.4) | 0.82 |
| LGA, n (%) | 1181 (9.9) | 1045 (10.8) | 975 (10.6) | 1546 (12.3) | <0.001 |
| LGA with diabetes mellitus/GDM, n (%) | 110 (0.9) | 136 (1.4) | 137 (1.5) | 260 (2.1) | <0.001 |
| Congenital malformations, n (%) | 755 (6.4) | 655 (6.7) | 600 (6.5) | 695 (5.5) | 0.001 |
| NICU admissions, n (%) | 433 (3.7) | 509 (5.2) | 425 (4.6) | 626 (5) | <0.001 |
| Neonatal death, n (‰) | 9 (0.76) | 9 (0.97) | 9 (0.97) | 18 (1.43) | 0.3 |
BW: birth weight (g); GA: gestational age (weeks); GDM: gestational diabetes mellitus; NICU: neonatal intensive care unit; Neonatal death: death during the first 28 days of life.
*Multiparity: calculated for infants delivered vaginally.