孟德尔的随机化和调解分析自我报告的步行节奏和冠状动脉疾病
Iain R Timmins1,2,3, Francesco Zaccardi4, Thomas Yates4,5
1Department of Population Health Sciences, University of Leicester, Leicester, UK. iain.timmins@btinternet.com.
Scientific reports
|May 1, 2024
概括
快速步行可以显著降低心血管疾病的风险. 更快的步行速度,即使是1英里/小时,也与63%的冠状动脉疾病风险降低有关,其中45%的效果是由BMI调解的.
科学领域:
- 遗传学和流行病学
- 心血管健康 心血管健康
- 公共卫生干预措施 公共卫生干预措施
背景情况:
- 心血管疾病 (CVD) 仍然是全球主要的死亡原因.
- 了解可修改的生活方式因素,如身体活动,对于预防心血管疾病至关重要.
- 习惯性步行速度是体力活动强度的一个易于测量的指标.
研究的目的:
- 调查习惯性步行节奏与患心血管疾病的风险之间的因果关系.
- 量化与增加步行节奏相关的潜在心血管疾病风险降低.
- 探索身体质量指数 (BMI) 在这种关系中的调解作用.
主要方法:
- 采用孟德尔随机化 (MR) 方法,使用与习惯性步行节奏相关的遗传变异.
- 对来自英国生物银行的大型队列 (34万名参与者) 进行了单样和双样MR分析.
- 利用隐性变量框架进行可靠的估计,并应用灵敏度分析来解决潜在的偏差,如 pleiotropy 和逆因果关系.
主要成果:
- 习惯步行速度增加1英里/小时 (1.6公里/小时) 与冠状动脉疾病风险减少63% (HR=0.37,P=2.0×10−6) 有因果关联.
- 身体质量指数 (BMI) 约占步行节奏对冠状动脉疾病风险总影响的45%.
- 通过独立的数据集和敏感性分析,研究结果得到了强有力的验证.
结论:
- 习惯性步行速度是降低心血管疾病风险的重要因果因素.
- 鼓励个人采取快速步行步伐是预防心血管疾病的可行公共卫生战略.
- 通过促进更快步行的干预措施来准BMI可能会增强心血管保护作用.
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