TABLE 1.
Demographic Characteristics to First Study Day 1 (n = 69)
| Mean ± SD | Range | |
|---|---|---|
| Birth weight (g) | 1240 ± 428 | 500–2525 |
| Gestational age at birth (wk) | 29 ± 2 | 24–32 |
| SNAP-II day 1* | 15 ± 9 | 5–46 |
| Ventilation (d) | 10 ± 13 | 0–50 |
| Other respiratory support | 10 ± 9 | 0–36 |
| Dexamethasone (d) | 0.2 ± 0.1 | 0–8 |
| Pain exposure if Pain only first (procedure A)† |
84 ± 55 | 8–211 |
| Pain exposure if Diaper first (procedure B)† |
81 ± 65 | 11–276 |
| Intravenous morphine exposure if Pain first procedure‡ |
0.1 ± 0.2 | 0–0.6 |
| Intravenous morphine exposure if Diaper first procedure‡ |
0.1 ± 0.2 | 0–0.1 |
| Maternal age (yrs) | 31 ± 6 | 19–47 |
*
Score for Neonatal Acute Physiology. 11
†
Number of invasive (skin-breaking) procedures from birth to the first study day.
‡
Morphine exposure = (daily average intravenous mg/kg) X days.