Table 2. Comparisons of demographic characteristics between the infants with 2.5–3.99 kg and above 4.0 kg.
| Variables | Birth weight | P value | ||
|---|---|---|---|---|
| 2.5–3.99 kg (n = 384,181) | ≥ 4.0 kg (n = 12,866) | Total (n = 397,047) | ||
| Male | 196,488 (51.1) | 8,349 (64.9) | 204,837 (51.6) | < 0.001 |
| Death | 212 (0.1) | 9 (0.1) | 221 (0.1) | 0.732 |
| Sepsis | 4,899 (1.3) | 236 (1.8) | 5,135 (1.3) | < 0.001 |
| HMD | 2,348 (0.6) | 94 (0.7) | 2,442 (0.6) | 0.063 |
| Mother with GDM | 5,941 (1.5) | 618 (4.8) | 6,559 (1.7) | < 0.001 |
| Clavicle fracture | 1,925 (0.5) | 252 (1.96) | 2,177 (0.55) | < 0.001 |
| Brachial plexus injury | 1,954 (0.51) | 264 (2.05) | 2,218 (0.56) | < 0.001 |
| Erb's palsy | 12 (0) | 7 (0.05) | 19 (0) | < 0.001 |
| Klumpke's palsy | 3 (0) | 1 (0.01) | 4 (1) | 0.047 |
| Torticollis | 1,828 (0.48) | 46 (0.36) | 1,874 (0.47) | 0.011 |
Data are presented as number (%).
HMD = hyaline membrane disease, GDM = gestational diabetes mellitus.