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重症组与轻症组基本资料比较[例（%）]
| 组别 | 例数 | 男性 | 早产儿 | 低出生体重儿(< 2 500 g) | 小于胎龄儿 | 使用NCPAP | 剖宫产 | 胎膜早破 > 18 h | 有创机械通气 | TSH > 20 mIU/L | ABO溶血病 |
| 注：[NCPAP]经鼻持续气道正压通气；[TSH]促甲状腺激素。 | |||||||||||
| 轻症组 | 50 | 30(60) | 3(6) | 2(4) | 2(4) | 2(4) | 10(20) | 2(4) | 1(2) | 3(6) | 7(14) |
| 重症组 | 50 | 37(74) | 2(4) | 1(2) | 1(2) | 2(4) | 14(28) | 1(2) | 1(2) | 2(4) | 6(12) |
| χ2值 | 2.216 | 0.000 | 0.000 | 0.000 | 0.000 | 0.877 | 0.000 | 0.000 | 0.000 | 0.088 | |
| P值 | 0.137 | 1.000 | 1.000 | 1.000 | 1.000 | 0.349 | 1.000 | 1.000 | 1.000 | 0.766 | |
