三个队伍中老年人的乳制品摄入量和认知功能:孟德尔的随机化研究
Natalia Ortega1,2,3,4, Nick J Mueller5, Abbas Dehghan6,7,8
1Institute for Primary Health Care (BIHAM), University of Bern, Bern, Switzerland. natalia.ortega@unibe.ch.
Nutrition journal
|January 31, 2025
概括
这项研究发现,消费乳制品影响认知功能的证据很弱. 遗传分析表明,乳制品摄入对老年人的大脑健康几乎没有影响.
科学领域:
- 营养流行病学 营养流行病学
- 遗传学 遗传学 是一个
- 认知科学 认知科学
背景情况:
- 关于乳制品和认知的观察研究由于混而没有结论.
- 乳糖酶持久性遗传变异可以作为乳制品消费的工具变量.
- 这项研究使用遗传数据调查了乳制品对认知功能的因果关系.
研究的目的:
- 评估总和非发酵乳制品消费对认知功能的长期影响.
- 利用门德尔的随机化来克服观察性研究中的混.
- 检查与遗传预测的乳制品摄入量相关的认知表现.
主要方法:
- 一个样本的门德尔随机化方法使用了来自43836名55岁以上的人的数据.
- 从三个基于人口的研究中收集了基因型,饮食数据和认知功能测量.
- 两阶段最小二次回归估计了乳制品消费及其与认知测试 (MMSE,心理交替测试等) 的关联. ) 的情况.
主要成果:
- 基因预测的乳制品摄入量在各个队伍 (瑞士,荷兰,加拿大) 中各不相同.
- 在两个队列中,在基因预测的乳制品摄入量和一般认知 (MMSE) 之间没有发现显著的关联.
- 在加拿大长度老龄化研究 (CLSA) 中,更高的遗传预测乳制品摄入量与在心理交替测试,口语流,口语学习和执行功能方面的表现改善有关.
结论:
- 对乳制品消费对一般认知功能的因果关系的证据较弱.
- 这些发现与之前的观察性研究一致,表明影响有限.
- 专注于乳制品消费的干预措施不太可能显著改善认知功能.
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