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Associations of leisure-time, occupational, and commuting physical activity with risk of depressive symptoms among Japanese workers: a cohort study

BACKGROUND: Leisure-time physical activity is associated with a lower risk of depression. However, the precise shape of the dose–response relationship remains elusive, and evidence is scarce regarding other domains of activity. We prospectively investigated associations of physical activity during l...

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Autores principales: Kuwahara, Keisuke, Honda, Toru, Nakagawa, Tohru, Yamamoto, Shuichiro, Akter, Shamima, Hayashi, Takeshi, Mizoue, Tetsuya
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4575427/
https://www.ncbi.nlm.nih.gov/pubmed/26384967
http://dx.doi.org/10.1186/s12966-015-0283-4
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author Kuwahara, Keisuke
Honda, Toru
Nakagawa, Tohru
Yamamoto, Shuichiro
Akter, Shamima
Hayashi, Takeshi
Mizoue, Tetsuya
author_facet Kuwahara, Keisuke
Honda, Toru
Nakagawa, Tohru
Yamamoto, Shuichiro
Akter, Shamima
Hayashi, Takeshi
Mizoue, Tetsuya
author_sort Kuwahara, Keisuke
collection PubMed
description BACKGROUND: Leisure-time physical activity is associated with a lower risk of depression. However, the precise shape of the dose–response relationship remains elusive, and evidence is scarce regarding other domains of activity. We prospectively investigated associations of physical activity during leisure, work, and commuting with risk of depressive symptoms in Japanese workers. METHODS: We conducted a cohort study of 29 082 Japanese workers aged 20–64 years without psychiatric disease (including depressive symptoms) at baseline with a maximum 5-year follow-up. Physical activity was self-reported. Depressive symptoms were assessed by 13 self-report questions on subjective symptoms. Hazard ratios (HRs) and 95 % confidence intervals (CIs) for incidence of depressive symptoms were calculated using Cox regression analysis. RESULTS: During a mean follow-up of 4.7 years, 6177 developed depressive symptoms. Leisure exercise showed a U-shaped association with risk of depressive symptoms adjusting for potential confounders. Additional adjustment for baseline depression scores attenuated the association, but it remained statistically significant (P for trend = 0.037). Compared with individuals who engaged in sedentary work, the HR (95 % CI) was 0.86 (0.81, 0.92) for individuals who stand or walk during work and 0.90 (0.82, 0.99) for those who are fairly active at work. However, the association disappeared after adjusting for baseline depression scores. Walking to and from work was not associated with depressive symptoms. CONCLUSIONS: The findings suggest that leisure-time exercise has a U-shaped relation with depressive symptoms in Japanese workers. Health-enhancing physical activity intervention may be needed for individuals who engage in sedentary work.
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spelling pubmed-45754272015-09-20 Associations of leisure-time, occupational, and commuting physical activity with risk of depressive symptoms among Japanese workers: a cohort study Kuwahara, Keisuke Honda, Toru Nakagawa, Tohru Yamamoto, Shuichiro Akter, Shamima Hayashi, Takeshi Mizoue, Tetsuya Int J Behav Nutr Phys Act Research BACKGROUND: Leisure-time physical activity is associated with a lower risk of depression. However, the precise shape of the dose–response relationship remains elusive, and evidence is scarce regarding other domains of activity. We prospectively investigated associations of physical activity during leisure, work, and commuting with risk of depressive symptoms in Japanese workers. METHODS: We conducted a cohort study of 29 082 Japanese workers aged 20–64 years without psychiatric disease (including depressive symptoms) at baseline with a maximum 5-year follow-up. Physical activity was self-reported. Depressive symptoms were assessed by 13 self-report questions on subjective symptoms. Hazard ratios (HRs) and 95 % confidence intervals (CIs) for incidence of depressive symptoms were calculated using Cox regression analysis. RESULTS: During a mean follow-up of 4.7 years, 6177 developed depressive symptoms. Leisure exercise showed a U-shaped association with risk of depressive symptoms adjusting for potential confounders. Additional adjustment for baseline depression scores attenuated the association, but it remained statistically significant (P for trend = 0.037). Compared with individuals who engaged in sedentary work, the HR (95 % CI) was 0.86 (0.81, 0.92) for individuals who stand or walk during work and 0.90 (0.82, 0.99) for those who are fairly active at work. However, the association disappeared after adjusting for baseline depression scores. Walking to and from work was not associated with depressive symptoms. CONCLUSIONS: The findings suggest that leisure-time exercise has a U-shaped relation with depressive symptoms in Japanese workers. Health-enhancing physical activity intervention may be needed for individuals who engage in sedentary work. BioMed Central 2015-09-18 /pmc/articles/PMC4575427/ /pubmed/26384967 http://dx.doi.org/10.1186/s12966-015-0283-4 Text en © Kuwahara et al. 2015 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research
Kuwahara, Keisuke
Honda, Toru
Nakagawa, Tohru
Yamamoto, Shuichiro
Akter, Shamima
Hayashi, Takeshi
Mizoue, Tetsuya
Associations of leisure-time, occupational, and commuting physical activity with risk of depressive symptoms among Japanese workers: a cohort study
title Associations of leisure-time, occupational, and commuting physical activity with risk of depressive symptoms among Japanese workers: a cohort study
title_full Associations of leisure-time, occupational, and commuting physical activity with risk of depressive symptoms among Japanese workers: a cohort study
title_fullStr Associations of leisure-time, occupational, and commuting physical activity with risk of depressive symptoms among Japanese workers: a cohort study
title_full_unstemmed Associations of leisure-time, occupational, and commuting physical activity with risk of depressive symptoms among Japanese workers: a cohort study
title_short Associations of leisure-time, occupational, and commuting physical activity with risk of depressive symptoms among Japanese workers: a cohort study
title_sort associations of leisure-time, occupational, and commuting physical activity with risk of depressive symptoms among japanese workers: a cohort study
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4575427/
https://www.ncbi.nlm.nih.gov/pubmed/26384967
http://dx.doi.org/10.1186/s12966-015-0283-4
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