Preterm (<37 gestational weeks) infants in England with a diagnosis of brain injury, before and after exclusion of conditions leading to brain injury prior to birth
| Year | Preterm infants recorded in the NNRD | Preterm live births in England | Preterm infants with brain injury, before exclusions | Preterm infants with brain injury adjusted for incomplete NNRD coverage | Preterm infants with brain injury after adjustment and exclusions | Rate of brain injuries per 1000 preterm live births, after exclusions (95% CI) |
| 2010 | 28 960 | 43 928 | 1181 | 1273 to 1310 | 1254 to 1290 | 28.54 to 29.37 |
| 2011 | 31 249 | 44 547 | 1251 | 1281 to 1298 | 1268 to 1284 | 28.47 to 28.83 |
| 2012 | 32 752 | 49 949 | 1295 | Not adjusted | 1285 | 25.73 (24.36 to 27.17) |
| 2013 | 32 264 | 48 844 | 1263 | Not adjusted | 1253 | 25.65 (24.27 to 27.11) |
| 2014 | 33 036 | 49 379 | 1343 | Not adjusted | 1339 | 27.12 (25.70 to 28.61) |
| 2015 | 33 740 | 50 308 | 1309 | Not adjusted | 1302 | 25.88 (24.51 to 27.33) |
Data for 2010 and 2011 are adjusted to account for the incomplete coverage of the NNRD during these years; from 2012 onwards, the NNRD has complete population coverage of neonatal admissions in England so no adjustment was necessary, and data are presented as a rate (95% CI).
NNRD, National Neonatal Research Database.