Association between social isolation and depression: Evidence from longitudinal and Mendelian randomization analyses

Increasing evidence shows that social isolation and depression are likely to interact with each other, yet the direction and causality of the association are not clear. This study aims to examine the possible reciprocity in the relationship between social isolation and depression. This study fitted...

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Published in:Journal of affective disorders 2024-04, Vol.350, p.182-187
Main Authors: Zhu, Shuai, Kong, Xiangjie, Han, Fulei, Tian, Huimin, Sun, Shuqin, Sun, Yanping, Feng, Wenjing, Wu, Yili
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Language:English
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Cross-lagged panel model
Depression
Mendelian randomization
Social isolation
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container_title Journal of affective disorders
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Kong, Xiangjie
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description Increasing evidence shows that social isolation and depression are likely to interact with each other, yet the direction and causality of the association are not clear. This study aims to examine the possible reciprocity in the relationship between social isolation and depression. This study fitted a cross-lagged panel model (CLPM) by using data from the English Longitudinal Study of Aging (ELSA, 2014–2019, n = 6787) to examine the temporal relationship between social isolation and depressive symptoms in older adults. We then conducted two-sample bidirectional Mendelian randomization (MR) analyses by using independent genetic variants associated with multiple social isolation phenotypes (n = 448,858-487,647) and with depression (n = 215,644-2,113,907) as genetic instruments from genome-wide association studies to assess the causality between social isolation and onset of depression. The CLPM in the ELSA cohort showed a significant and positive lagged effect of social isolation on depressive symptoms (β = 0.037, P 
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subjects Cross-lagged panel model
Depression
Mendelian randomization
Social isolation
title Association between social isolation and depression: Evidence from longitudinal and Mendelian randomization analyses
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