Variable | Pre-implementation* | Post implementation* |
Sociodemographic characteristics of babies† | ||
Babies (n) | 3630 | 3441 |
Gestational age (weeks), median (IQR) | 27.9 (25.9–29.0) | 27.9 (26.0–29.1) |
Birth weight (g), median (IQR) | 982 (770–1210) | 980 (769–1205) |
Birth weight adjusted for gestational age (z-score), median (IQR) | 0.1 (−0.6 to 0.7) | 0.1 (−0.6 to 0.7) |
Male sex, n (%) | 1960 (54.0) | 1851 (53.8) |
Multiple births, n (%) | 871 (24.0) | 817 (23.7) |
Sociodemographic and clinical characteristics of mothers | ||
Mothers (n) | 3189 | 3016 |
Maternal age (years), mean (SD) | 31 (6) | 31 (6) |
White ethnicity, n (%) | 1711 (60.2) | 1610 (61.2) |
Level of deprivation (IMD quintile), n (%) | ||
1 (most deprived) | 1108 (31.0) | 1112 (32.9) |
2 | 912 (25.6) | 773 (22.9) |
3 | 643 (18.0) | 621 (18.4) |
4 | 485 (14.0) | 454 (13.4) |
5 (least deprived) | 422 (11.82) | 418 (12.4) |
Hypertension in pregnancy, n (%) | 128 (3.5) | 157 (4.6) |
Antenatal steroids given, n (%) | 3340 (92.1) | 3220 (93.9) |
Maternity unit characteristics | ||
Special care unit/high dependency unit, n (%) | 1336 (36) | 1226 (35.6) |
Neonatal intensive care unit, n (%) | 2294 (63.2) | 2215 (64.4) |
Average number of eligible births per hospital per month, mean (SD) | 2.9 (2.1) | 2.9 (2.1) |
*Figures cover the 12 months prior to, and 12 months following the recorded NPP adoption date at each unit, excluding the month of adoption itself.
†All babies in the dataset including multiples
IMD, Index of Multiple Deprivation; NPP, National PReCePT Programme; PReCePT, Preventing Cerebral Palsy in Pre Term labour.