Background characteristics of study participants
| Morphine (n = 60) | Placebo (n = 66) | |
|---|---|---|
| Unless otherwise indicated, data are median (25th to 75th centile). | ||
| In/outborn, Born inside or outside of the participating hospitals; CRIB, clinical risk index for babies. | ||
| Sex (boys/girls) | 38/22 | 37/29 |
| In/outborn | 45/15 | 44/22 |
| Gestational age (weeks) | 30.3 (27.5 to 32.1) | 29.6 (28.4 to 32.1) |
| Birth weight (g) | 1380 (1004 to 1840) | 1340 (1024 to 1674) |
| Postnatal age (hours) | 8.5 (5.0 to 13.0) | 8.0 (5.0 to 12.0) |
| Apgar score at 1 min | 6 (4 to 8) | 6 (4 to 8) |
| Apgar score at 5 min | 8 (7 to 9) | 8 (7 to 9) |
| Dopamine infusions (%) | 23 | 23 |
| Prenatal corticosteroids (%) | 57 | 55 |
| CRIB score | 2 (1 to 5) | 3 (1 to 6) |