身体组成和25-基维生素D水平之间的因果关系:双向孟德尔随机化分析
Li Jixin1, Wenru Wang, Linjie Qiu
1Xiyuan Hospital, China Academy of Chinese Medical Sciences, China.
Medicine
|December 17, 2024
概括
像BMI和体脂百分比这样的肥胖指标因果性地降低了维生素D水平,但较低的维生素D不会影响肥胖. 这项研究阐明了肥胖和维生素D缺乏之间的单向关系.
科学领域:
- 遗传学和流行病学
- 营养科学 营养科学
- 代谢健康 代谢健康
背景情况:
- 观察性研究表明,肥胖和维生素D缺乏之间存在联系.
- 这种关系的因果方向仍然不清楚.
- 门德尔的随机化提供了一个强大的方法来调查因果关系.
研究的目的:
- 调查肥胖相关指标和25-氧维生素D (25(OH) D水平之间的双向因果关系.
- 为了确定肥胖指标是否会影响维生素D水平或反之.
- 提供关于肥胖和维生素D状况之间的病因联系的有力的证据.
主要方法:
- 进行了双向门德尔随机化 (MR) 分析.
- 选择了身体质量指数 (BMI),腰比 (WHR),身体脂肪百分比 (BFP) 和全身脂肪质量 (WFM) 的仪器变量.
- 使用了逆方差加权 (IVW),MR Egger和加权中位数方法.
- 使用MR-PRESSO进行的敏感性分析评估了异质性和性.
主要成果:
- 在较高的BMI,WHR,BFP和WFM之间发现了统计学上显著的因果关联,并降低了25...OH) D水平 (所有P<.001).
- 在与肥胖相关的身体指标上,没有观察到25(OH) D水平的显著因果作用.
- 灵敏度分析证实了研究结果的可靠性,没有发现实质性的异质性或类型.
结论:
- 这项研究提供了强有力的证据,证明肥胖相关的身体成分对降低的25...OH) D水平的因果关系.
- 这些发现排除了显著的反向因果关系,表明肥胖会影响维生素D状态.
- 这些结果对了解代谢健康和维生素D在公共卫生中的相互作用有影响.
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