4.
两组患儿的安全性评价[n（%）]
| 项目 | 例数 | 气胸* | 鼻黏膜、鼻中隔损伤 | |||
| 无损伤 | 轻度(压红) | 中度(出血) | 重度(皮肤溃烂) | |||
| 注：*采用Fisher确切概率法进行检验。 | ||||||
| 鼻塞式CPAP组 | 61 | 1(2) | 48(79) | 11(18) | 2(3) | 0(0) |
| 气泡式CPAP组 | 69 | 1(1) | 56(81) | 12(17) | 1(2) | 0(0) |
| Z值 | - | -0.393 | ||||
| P值 | 0.716 | 0.736 | ||||
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