| 组别 | n | 胎龄/w | 出生体重/g |
| 非脑损伤组 | 225 | 31.43 ± 2.39 | 1535 (1255, 1805) |
| 脑损伤组 | 73 | 31.23 ± 2.60 | 1570 (1325, 1845) |
| t/z值 |
| 0.630 | −0.940 |
| P值 |
| 0.530 | 0.350 |