Number of babies surviving to discharge at each gestational age in each birth year category (% surviving of those admitted)
| Gestational age (completed weeks) | |||||
|---|---|---|---|---|---|
| Birth year | 22 n (%) | 23 n (%) | 24 n (%) | 25 n (%) | Total n (%) |
| 1991–1995 | 0 (0%) | 4 (7.1%) | 31 (22.0%) | 72 (40.2%) | 107 (27.5%) |
| 1996–2000 | 0 (0%) | 11 (14.3%) | 44 (31.7%) | 93 (50.8%) | 148 (36.1%) |
| 2001–2005 | 0 (0%) | 8 (17.0%) | 65 (39.7%) | 112 (61.5%) | 185 (46.5%) |
| 2006–2010 | 0 (0%) | 16 (20.0%) | 66 (43.7%) | 137 (67.2%) | 219 (50.2%) |
| Total | 0 (0%) | 39 (15.0%) | 206 (34.6%) | 414 (55.4%) | 659 (40.3%) |
| p Value: test for trend | - | 0.08 | 0.004 | 0.002 | <0.001 |