Details of groups median (range)
| Ventilated unstable (n=14) | Ventilated stable (n=11) | Non-ventilated stable (n=10) | |
|---|---|---|---|
| Gestational age (weeks) | 28 (25–31) | 29 (24–34) | 28 (28–33) |
| Birth weight (g) | 1057 (740–1605) | 1170 (505–2015) | 1105 (665–1704) |
| Age at time of study (h) | 49 (36–120) | 46 (24–120) | 44 (24–72) |