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一个关于疹疫苗对痴呆症的影响的自然实验

Markus Eyting^1,2,3, Min Xie^1,4, Felix Michalik^1,4

¹Division of Primary Care and Population Health, Department of Medicine, Stanford University, Stanford, CA, USA.

|April 2, 2025

概括

在自然实验中,活体减弱疹疫苗显著减少了20%的痴呆症诊断. 这表明杆疫苗可以预防或延迟痴呆症,特别是在女性身上.

科学领域:

神经学
免疫学
公共卫生

背景情况:

神经热带性疹病毒与痴呆症的发展有关.
疫苗可能会产生异常免疫效应.
疫苗对痴呆症发病率的影响尚不清楚.

研究的目的:

确定活体减弱疹疫苗对痴呆症诊断的因果关系.
在疫苗资格方面利用自然实验提供强有力的证据.

主要方法:

根据威尔士的特定资格截止日期使用回归不连续性设计.
分析了大规模的电子健康记录数据, 以比较符合条件和不符合条件的患者的痴呆发病率.
使用英格兰和威尔士的死亡证明数据证实了这一发现.

主要成果:

在7年内,Zoster疫苗接种使得新的痴呆症诊断的可能性降低了3. 5个百分点 (相对降低了20%).
保护作用在女性中更为明显.
在不同数据集和结果指标中发现一致性.

结论:

活体减弱疹疫苗显示出预防或延迟痴呆的作用.
这项研究提供了因果关系证据,缓解了先前的关联性研究中存在的混和偏见.
疫苗接种是预防痴呆症的一种潜在策略.

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