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身体质量指数和围腹之间的因果关系:一个门德尔的随机化研究

Long Wu¹, Huan Wu², Xiao-Yun Li¹

¹Department of Colorectal Cancer Center, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou Province, 550001, China.

BMC gastroenterology

|December 11, 2025

概括

身体质量指数 (BMI) 升高因果性地增加了近腹风险. 这项遗传研究表明,肥胖管理可能是围腹的关键预防策略.

科学领域:

遗传学和流行病学
公共卫生公共卫生

背景情况:

观察性研究表明,较高的体重指数 (BMI) 和围风险之间存在联系.
观察性研究的局限性包括混和反向因果关系,需要强大的因果推断方法.

研究的目的:

调查BMI和围风险之间的因果关系.
利用门德尔的随机化 (MR) 来克服观察性研究的局限性.

主要方法:

采用两样MR设计,使用全基因组关联研究 (GWAS) 数据用于欧洲祖先人口中的BMI和围腹.
选择了364个独立的单核酸多态 (SNP) 用于BMI作为仪器变量,并应用了严格的质量控制.
使用逆变量加权 (IVW),MR-Egger和加权中位数方法来估计因果效应,并使用MR-PRESSO进行变性评估. 多变量MR (MVMR) 调整为潜在的混因素.

主要成果:

基因预测的更高的BMI显示出与增加的近腹风险有显著的因果关系 (IVW OR=1.94,P=3.8×10−6).
结果在多种MR方法中一致,并且在对脂质和胰岛素耐药性途径进行MVMR调整后是稳健的.
灵敏度分析证实没有显著的方向形或异质性,并且仪器强度足够.

结论:

这项MR研究提供了强有力的遗传证据,表明高BMI是围的因果风险因素.
研究结果支持肥胖管理作为周腹的潜在预防措施.
需要进一步的研究来探索这种关联背后的多因素机制.

关键词:

这就是为什么BMI是BMI.有因果关系的因果关系.门德尔的随机化周边腹是什么意思?周边腹是什么意思?单个核酸的多态性.

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