| Time | Variable | OR (95% CI) |
| Birth | Apgar at 10 min <5 | 6.16 (1.4 to 26.7) |
| pH (cord/<60 min) | 0.02 (0.0001 to 0.72) | |
| Early 1.5 h | Lactate at 1.5 h | 1.29 (1.04 to 1.6) |
| Ventilated at 1.5 h | 17.08 (2.08 to 139) | |
| Intermediate (4–5 h) | Lactate at 4 h | 1.26 (1 to 1.58) |
| Ventilated at 5 h | 8.49 (1.3 to 55.3) |
OR, odds ratio.