3.
不同VD水平患儿病情危重程度变化及出院结局比较 [例（%）]
| 组别 | 例数 | 病情危重程度 | 出院结局 | |||||
| 好转 | 不变 | 恶化 | 治愈 | 好转 | 未愈或死亡 | |||
| VD升高组 | 81 | 50(62) | 29(36) | 2(2) | 24(30) | 51(63) | 6(7) | |
| VD下降组 | 51 | 8(16) | 33(65) | 10(20) | 9(18) | 25(49) | 17(33) | |
| Z值 | -5.517 | 3.190 | ||||||
| P值 | < 0.01 | 0.001 | ||||||
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