Unit of birth, transfer status and survival by epoch.
| Epoch 1: 1998–2000 | Epoch 2: 2009 | p value for difference between epoch 1 and 2 | ||||
|---|---|---|---|---|---|---|
| Days | n | % | n | % | ||
| Neonatal unit of birth (categorised by annual intensive care days) | 1–499 | 843 | 25.1 | 141 | 11.4 | <0.001 |
| 500–999 | 673 | 20.1 | 231 | 18.7 | ||
| 1000–1499 | 653 | 19.5 | 135 | 10.9 | ||
| 1500–1999 | 556 | 16.6 | 110 | 8.9 | ||
| >2000 | 631 | 18.8 | 619 | 50.1 | ||
| Total | 3356 | 1236 | ||||
| Transfer status | n | % | n | % | ||
| Transfers | Not transferred | 2668 | 75.8 | 858 | 64.0 | <0.001 |
| ≤24 h | 238 | 6.8 | 170 | 12.7 | ||
| 24 h–28 days | 616 | 17.5 | 312 | 23.3 | ||
| Total | 3522 | 1340 | ||||
| Transfer status | % | % | ||||
| Survival at 28 days by transfer group | Not transferred | 86.2% | 92.9% | <0.001 | ||
| ≤24 h | 87.8% | 93.3% | ||||
| 24 h–28 days | 95.9% | 98.1% | ||||
| Total | 88.0% | 94.0% | ||||