Sample Characteristics
| Characteristic | Mean (SD) or n (%) |
|---|---|
| Gestational age (weeks) | 39 (1.5) |
| Birth weight (grams) | 3368 (489.4) |
| Age at time of measurements (hours) | 40 (13.4) |
| Serum bilirubin for age | |
| below 75th percentile | 120 (62.5%) |
| 75th to 95th percentile | 60 (31.3%) |
| above 95th percentile | 12 (6.3%) |