| 项目 | n (%) | 输血次数 | c2/fisher值 | P值 | |
| 1次(%) | ≥2次(%) | ||||
| 女 | 57 (47.9) | 45 (78.9) | 12 (21.1) | 4.388 | 0.046 | 
| 剖宫产 | 78 (65.5) | 54 (69.2) | 24 (30.8) | 0.029 | >0.05 | 
| 多胎 | 28 (23.5) | 20 (71.4) | 8 (28.6) | 0.049 | >0.05 | 
| 辅助生殖受孕 | 15 (12.6) | 10 (66.7) | 5 (33.3) | 
 | >0.05 | 
| 胎膜早破 | 37 (31.1) | 28 (75.7) | 9 (24.3) | 0.894 | >0.05 | 
| 羊水污染 | 29 (24.4) | 19 (65.5) | 10 (34.5) | 0.325 | >0.05 | 
| 脐带异常 | 34 (28.6) | 22 (64.7) | 12 (35.3) | 0.573 | >0.05 | 
| 胎盘异常 | 16 (13.4) | 11 (68.8) | 5 (31.3) | 
 | >0.05 | 
| 出生地 | 
 | 
 | 
 | 
 | 
 | 
| 本院 | 102 (85.7) | 69 (67.6) | 33 (32.4) | 1.493 | >0.05 | 
| 外院 | 17 (14.3) | 14 (82.4) | 3 (17.6) | 
 | 
 | 
| 1胎 | 82 (68.9) | 59 (72.0) | 23 (28.0) | 0.607 | >0.05 | 
| 胎龄 | 
 | 
 | 
 | 
 | 
 | 
| <32周 | 63 (52.9) | 38 (60.3) | 25 (39.7) | 5.643 | 0.027 | 
| ≥32周 | 56 (47.1) | 45 (80.4) | 11 (19.6) | 
 | 
 | 
| 出生体重(g) | 
 | 
 | 
 | 
 | 
 | 
| <1500 | 62 (52.1) | 36 (58.1) | 26 (41.9) | 8.374 | 0.005 | 
| ≥1500 | 57 (47.9) | 47 (82.5) | 10 (17.5) | 
 | 
 | 
| 身长(cm) | 
 | 
 | 
 | 
 | 
 | 
| ≤40 | 61 (51.3) | 36 (59.0) | 25 (41.0) | 6.831 | 0.010 | 
| >40 | 58 (48.7) | 47 (81.0) | 11 (19.0) | 
 | 
 |