2.
不同血清25(OH)D水平患儿的哮喘控制率
| [n（%）] | ||||
| 组别 | 例数 | 良好控制 | 部分控制 | 未控制 |
| 维生素D正常组 | 35 | 11(31) | 12(34) | 12(34) |
| 维生素D不足组 | 82 | 16(20) | 30(37) | 36(44) |
| 维生素D缺乏组 | 33 | 2(6) | 12(36) | 19(58) |
| χ2值 | 6.915 | |||
| P值 | 0.009 | |||
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