Clinical characteristics of the 1161 neonates
| Characteristics | Number | % |
| Sex | ||
| Male | 618 | 53.2 |
| Female | 543 | 46.8 |
| Gestational age (weeks) | ||
| 35–37 | 57 | 4.9 |
| ≥37 | 1104 | 95.1 |
| Birth weight (g) | ||
| <2500 | 34 | 2.9 |
| 2500–4000 | 1039 | 89.5 |
| >4000 | 88 | 7.6 |
| Postnatal day of measurement (days) | ||
| 0–3 | 566 | 48.8 |
| 4–7 | 360 | 31.0 |
| 8–14 | 145 | 12.5 |
| 15–28 | 90 | 7.7 |
| TSB (μmol/L) | ||
| <85.5 | 63 | 5.4 |
| 85.5–170.9 | 168 | 14.5 |
| 171.0–256.4 | 373 | 32.1 |
| 256.5–341.9 | 475 | 40.9 |
| 342.0–427.4 | 69 | 5.9 |
| 427.5–512.9 | 9 | 0.8 |
| ≥513.0 | 4 | 0.3 |
TSB, total serum bilirubin.