Population characteristics for infants born ≤32+6 weeks gestation and discharged from neonatal care during 2009–2012
| East of England n=3680 | Rest of UKNC n=29 492 | p Value for difference | |
|---|---|---|---|
| Gestational age (weeks+days), n (%) | 0.07* | ||
| ≤25+6 | 221 (6) | 1838 (6) | |
| 26+0 to 28+6 | 747 (20) | 6453 (22) | |
| 29+0 to 30+6 | 966 (26) | 7286 (25) | |
| 31+0 to 32+6 | 1746 (47) | 13 915 (47) | |
| Birth weight (g), mean (SD) | 1404 (417) | 1394 (420) | 0.018** |
| Missing | 18 | 139 | |
| Male n (%) | 1878 (51) | 15 681 (53) | 0.01* |
| Multiple birth n (%) | 1158 (31) | 8290 (28) | <0.001* |
| Mother's age (years) mean (SD) | 30.3 (6.2) | 30.0 (6.4) | 0.03** |
| Missing | 1 | 119 | |
| Mother smoked during pregnancy | 674 (20) | 5364 (21) | 0.27* |
| Missing | 289 | 3579 |
p Values from χ2 (*) or t test (**); all percentages and tests exclude missing data.
UKNC, UK Neonatal Collaborative.