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Abstract：
This present study aims to investigate the effect of tea consumption on cognitive function and examine possible psychosocial mechanisms in older adults.
The data of this study came from the 2018 wave of the Chinese Longitudinal Healthy Longevity Survey(CLHLS), and a total of 11,910 valid samples were included. We used ordinary least squares (OLS) to explore whether frequent tea consumption had significant effect on the cognitive function of older people. The problem of endogeneity was addressed by using a propensity score matching (PSM). Then we further explored the psychosocial mechanisms of the effect using a stepwise regression approach.
Frequent tea consumption produced a positive effect on Mini-Mental State Examination (MMSE) score (coefficient = 0.340, p < 0.01), and PSM showed similar results. Specifically, the positive effect of green tea (coefficient 0.409, p < 0.01) was significantly greater than the other teas (coefficient 0.261, p < 0.1). Moreover, frequent tea drinkers were 59.7, 74.8, and 81.8% less likely to have severe, moderate and mild cognitive impairment respectively, compared to infrequent tea drinkers (p < 0.01). Levels of depression and sleep quality had partial mediation effect for frequent tea consumption on cognitive function, accounting for 27.6 and 3.5% of the total effect, respectively.
Frequent tea consumption was found to have beneficial effects on cognitive function, especially in older people with green tea intake. Sleep quality and levels of depression partially mediated the association between frequent tea consumption and cognitive function among Chinese older adults.
The data of this study came from the 2018 wave of the Chinese Longitudinal Healthy Longevity Survey(CLHLS), and a total of 11,910 valid samples were included. We used ordinary least squares (OLS) to explore whether frequent tea consumption had significant effect on the cognitive function of older people. The problem of endogeneity was addressed by using a propensity score matching (PSM). Then we further explored the psychosocial mechanisms of the effect using a stepwise regression approach.
Frequent tea consumption produced a positive effect on Mini-Mental State Examination (MMSE) score (coefficient = 0.340, p < 0.01), and PSM showed similar results. Specifically, the positive effect of green tea (coefficient 0.409, p < 0.01) was significantly greater than the other teas (coefficient 0.261, p < 0.1). Moreover, frequent tea drinkers were 59.7, 74.8, and 81.8% less likely to have severe, moderate and mild cognitive impairment respectively, compared to infrequent tea drinkers (p < 0.01). Levels of depression and sleep quality had partial mediation effect for frequent tea consumption on cognitive function, accounting for 27.6 and 3.5% of the total effect, respectively.
Frequent tea consumption was found to have beneficial effects on cognitive function, especially in older people with green tea intake. Sleep quality and levels of depression partially mediated the association between frequent tea consumption and cognitive function among Chinese older adults.
摘要：
■本研究旨在调查饮茶对认知功能的影响，并研究老年人可能的心理社会机制。
■这项研究的数据来自2018年中国纵向健康长寿调查（CLHLS）的浪潮，共纳入11910份有效样本。我们使用普通最小二乘法（OLS）来探讨经常喝茶是否对老年人的认知功能有显着影响。内生性问题通过使用倾向评分匹配(PSM)来解决。然后，我们使用逐步回归方法进一步探索了该效应的心理社会机制。
■频繁饮用茶对迷你精神状态检查（MMSE）得分产生了积极影响（系数=0.340，p<0.01），和PSM显示类似的结果。具体来说,绿茶的积极作用（系数0.409，p<0.01）显着大于其他茶（系数0.261，p<0.1）。此外，经常喝茶的人有59.7、74.8和81.8%的可能性较低，中度和轻度认知障碍,与不经常喝茶的人相比（p<0.01）。经常饮茶对认知功能的影响，抑郁水平和睡眠质量具有部分中介作用。占总效果的27.6%和3.5%，分别。
■经常饮用茶被发现对认知功能有有益的影响，尤其是老年人的绿茶摄入量。睡眠质量和抑郁水平部分介导了中国老年人频繁饮茶与认知功能之间的关联。
■这项研究的数据来自2018年中国纵向健康长寿调查（CLHLS）的浪潮，共纳入11910份有效样本。我们使用普通最小二乘法（OLS）来探讨经常喝茶是否对老年人的认知功能有显着影响。内生性问题通过使用倾向评分匹配(PSM)来解决。然后，我们使用逐步回归方法进一步探索了该效应的心理社会机制。
■频繁饮用茶对迷你精神状态检查（MMSE）得分产生了积极影响（系数=0.340，p<0.01），和PSM显示类似的结果。具体来说,绿茶的积极作用（系数0.409，p<0.01）显着大于其他茶（系数0.261，p<0.1）。此外，经常喝茶的人有59.7、74.8和81.8%的可能性较低，中度和轻度认知障碍,与不经常喝茶的人相比（p<0.01）。经常饮茶对认知功能的影响，抑郁水平和睡眠质量具有部分中介作用。占总效果的27.6%和3.5%，分别。
■经常饮用茶被发现对认知功能有有益的影响，尤其是老年人的绿茶摄入量。睡眠质量和抑郁水平部分介导了中国老年人频繁饮茶与认知功能之间的关联。
