Basic and clinical details of babies receiving 50% or 100% oxygen, and cytokine concentrations at 0 hours in both oxygen groups
| 50% O2 (n = 26) | 100% O2 (n = 26) | |
|---|---|---|
| Data are expressed as median (range) or number. | ||
| PROM, Premature rupture of membranes; IL, interleukin; TNFα, tumour necrosis factor α. | ||
| Birth weight (g) | 1010 (518–1528) | 973 (560–1562) |
| Gestation (weeks) | 27 (23–31) | 28 (24–30) |
| Sex (F/M) | 11/15 | 13/13 |
| Apgar at 1 min | 5 (2–9) | 6.5 (1–10) |
| Apgar at 5 min | 8 (3–10) | 8 (3–10) |
| PROM (hours) | 0 (0–1221) | 0 (0–183) |
| Caesarean section | 10 | 13 |
| Clinical evidence of chorioamnionitis | 8 | 8 |
| Antenatal steroids (doses) | 2 (1–9) | 2 (1–9) |
| Time to intubation (min) | 4 (1–15) | 5 (2–20) |
| Time to surfactant (min) | 12 (3–59) | 15 (5–46) |
| Cord pH | 7.32 (6.95–7.44) | 7.31 (7.00–7.44) |
| Positive blood culture (taken at birth) | 0 | 0 |
| IL6 at 0 h (pg/ml) | 537 (0–17269) (n = 18) | 790 (16–29205) (n = 16) |
| IL1β at 0 h (pg/ml) | 37 (0–2950) (n = 18) | 35 (0–2637) (n = 16) |
| IL10 at 0 h (pg/ml) | 533 (10–2330) (n = 18) | 514 (43–1485) (n = 16) |
| TNFα at 0 h (pg/ml) | 51 (8–309) (n = 18) | 47 (10–662) (n = 15) |