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A J-shaped association between soy food intake and depressive symptoms in Chinese adults

Author:
Yu, Bin  Yu, Fei  Su, Qian  Zhang, Qing  Liu, Li  Meng, Ge  Wu, Hongmei  Xia, Yang  Bao, Xue  Shi, Hongbin  Gu, Yeqing  Fang, Liyun  Yang, Huijun  Sun, Shaomei  Wang, Xing  Zhou, Ming  Jia, Qiyu  Guo, Qi  Liu, Huijun  Song, Kun  Niu, Kaijun  


Journal:
CLINICAL NUTRITION


Issue Date:
2018


Abstract(summary):

Background & aims: Soy food has been proven to have multiple positive effects on human health, however, no study has yet investigated the association between habitual intake of soy food and depressive symptoms in general population. The objective of this study was to examine this association. Methods: In a cross-sectional analysis, we studied a sample of 13,760 adults (mean age 43.5 years) in Tianjin, China. The Self-Rating Depression Scale (SDS) was used to assess depressive symptoms, with four cut-off points (SDS >=3D 40, 45, 48 or 50) indicating increased level of depressive symptoms. Food Frequency Questionnaire (FFQ) was used to assess dietary intake. Results: In the total population, the prevalence of increased depressive symptoms was 7.2% (SDS >=3D 50). Comparing to the group with lowest intake frequency of soy food (=3D twice/day. Associations remained when other cut-off points (SDS >=3D 40, 45 or 48) were used as a definition of increased depressive symptoms. Conclusion: Findings from this study suggested a J-shaped association between intake frequency of soy food and incidence of depressive symptoms among adults. For the first time, the study provides evidence that light-to-moderate intake of soy food may reduce the incidence of depressive symptoms, while relatively high (>=3D twice/day) intake may generate the opposite effect. (C) 2017 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism. All rights reserved.


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1013---1018


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