Patient details at trial entry: (median + interquartile range)
| Treatment group | |||
|---|---|---|---|
| Morphine (n=44) | Diamorphine (n=44) | ||
| Postconceptional age (weeks) | 28 (26–30) | 27 (26–29) | p=0.34 |
| Birthweight (g) | 1058 (810–1440) | 980 (830–1270) | p=0.45 |
| Sex ratio (M/F) | 28/16 | 24/20 | p=0.39 |
| A:a ratio | 0.24 (0.14–0.57) | 0.39 (0.16–0.57) | p=0.40 |
| FIO2 | 0.45 (0.3–0.7) | 0.35 (0.21–0.7) | p=0.16 |
| Received surfactant | 35 | 32 | p=0.45 |
| Mean arterial blood pressure (mm Hg) | 34 (29–38) | 35 (32–40) | p=0.59 |