Number in cohort | 7898 |
<28 weeks’ gestation | 1634 (20.7) |
<1000 g birth weight | 1669 (21.1) |
Male | 4437 (56.2) |
Multiple pregnancy | 1959 (24.8) |
Delivered by caesarean section | 3863 (48.9) |
All deaths | 1133 (14.3) |
Deaths from lethal malformations | 119 (1.5) |
Ultrasound scan evidence of periventricular haemorrhage | 1873 (23.7) |
Sepsis (positive blood culture) | 1873 (23.7) |
Chronic lung disease (O2 at 28 days) | 1036 (13.1) |
Persistent arterial duct (clinical diagnosis) | 886 (11.2) |
Necrotising enterocolitis (radiographic or surgical diagnosis) | 319 (4.0) |