Table 1.
Preterm infant characteristics (N=87: mean (SD))
| Preterm 22–28 weeks GA at birth, n=30 | Preterm 29–32 weeks GA at birth, n=57 | |
|---|---|---|
| Gestational age at birth (weeks) | 27.17 (1.31) | 30.93 (1.26) |
| Birth weight (g) | 960.83 (254.87) | 1532.19 (390.71) |
| Illness severity day 1 (SNAP-II) | 18.13 (11.22) | 8.14 (8.07) |
| Illness severity day 3 (SNAP-II) | 5.50 (5.52) | 0.67 (2.21) |
| Mechanical ventilation (days)a | 17.53 (14.67) | 1.40 (3.13) |
| Other respiratory support (days)a | 10.80 (8.71) | 5.0 (6.35) |
| Pain exposure (number of skin breaking procedures)a | 115.20 (64.71) | 40.47 (25.98) |
| IV Morphine exposure (daily average mg/kg × days)a | 1.90 (2.70) | 0.06 (0.17) |
| Sex (male/female) | 16/14 | 31/26 |
a
Recorded daily from birth to test day (32 weeks±6 days postconceptional age).