1.
两组血清25(OH)D水平的比较
| (x±s，ng/mL) | ||
| 组别 | 例数 | 25(OH)D |
| 对照组 | 55 | 29±4 |
| 观察组 | 150 | 25±7 |
| t值 | 3.706 | |
| P值 | < 0.001 | |
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