General characteristics of infants where oxygen was given for ABC
| Patients’ characteristics | N=56 |
|---|---|
| Gestational age GA, weeks (median (IQR) | 28+1 (26+1–29+3) |
| Birth weight, grams (median (IQR) | 908 (800–1167) |
| Males, n (%) | 29 (52) |
| Apgar score 5 min, median (range) | 8 (5–10) |
| Singletons, n (%) | 22 (41) |
| Caesarean delivery, n (%) | 27 (50) |
| Mortality, n % | 4 (7) |
| BPDmoderate-severe at 36 weeks GA, %* | 7 |
| ROP ≥stage 3, %† | 7 |
| NEC ≥stage 2a, %‡ | 5 |
| IVH grade ≥2, %§ | 18 |
*Moderate/severe bronchopulmonary dysplasia (BPD), defined as oxygen dependence at 36 weeks postmenstrual age (PMA) (Bancalari and Claure, Seminars in Perinatology 2006;30:164–70).
†Moderate/severe retinopathy of prematurity (ROP), defined as ≥ grade 3 and/or the presence of plus disease according the International Classification of ROP (‘The International Classification of Retinopathy of Prematurity revisited,’ Archives of Ophthalmology 2005;123:991–9).
‡Necrotising enterocolitis (NEC), defined as grade ≥2a according to Bell et al (Bell et al, Annals of Surgery 1978;187:1–7).
§Moderate/severe intraventricular haemorrhage (IVH), defined as grade ≥II according Papile's criteria (Papile, Burstein, Burstein, et al, The Journal of Pediatrics 1978;92:529–34).
ABC, apnoea, bradycardia, cyanosis; GA, gestational age.