Clinical characteristics and blood gases per subject PND 1–7
| Total n=452 | |
| GA, weeks; mean (SD) | 26.4 (1.8) |
| Birth weight, g; mean (SD) | 876 (272) |
| BW SGA; n (%) | 111 (24.6) |
| Mortality*; n (%) | 61 (13.5) |
| Male; n (%) | 260 (57.5) |
| Twins; n (%) | 110 (24.3) |
| Triplets; n (%) | 18 (4) |
| Morbidities | |
| IVH grades 3–4; n (%)† | 43 (9.9) |
| Any IVH; n (%)† | 119 (27.4) |
| NEC; n (%)‡ | 23 (5.4) |
| BPD; n (%)§ | 213 (55.8) |
| CRIB-II score; mean (SD)¶ | 11.4 (3.3) |
*Before 36 weeks’ PMA.
†435 available for analysis.
‡425 available for analysis.
§382 available for analysis.
¶212 available for analysis.
BPD, bronchopulmonary dysplasia; BW SGA, birth weight small for gestational age; CRIB-II, Clinical Risk Index for Babies scoring system II; GA, gestational age; IVH, intraventricular haemorrhage; n, number; NEC, necrotising enterocolitis; PMA, postmenstrual age; PND, postnatal day.;