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Association between occupational physical activity and myocardial infarction: A prospective cohort study
Department of Natural Science and Biomedicine, School of Health and Welfare, Jönköping University, Jönköping.
Institute of Environmental Medicine, Karolinska Institutet, Stockholm; Centre for Occupational and Environmental Medicine, Stockholm County Council, Stockholm.
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
Occupational and Environmental Medicine, Uppsala University, Uppsala.
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2016 (English)In: BMJ Open, ISSN 2044-6055, E-ISSN 2044-6055, Vol. 6, no 10, e012692Article in journal (Refereed) Published
Abstract [en]

Objective Recommendations regarding physical activity typically include both leisure time and occupational physical activity. However, the results from previous studies on occupational physical activity and the association with myocardial infarction have been inconsistent. The aim of this study was to investigate if occupational physical activity is associated with the risk of myocardial infarction. Design Prospective cohort study. Participants Data from the Swedish Work, Lipids and Fibrinogen (WOLF) study was used, comprising 9961 employees (6849 men, 3112 women, mean age 42.7 years) having no history of myocardial infarction. The participants were categorised into 3 groups according to their level of occupational physical activity. Outcome Data regarding incident myocardial infarction were obtained from the Swedish National Patient Register and the Cause of Death Register. Cox proportional hazard regression was used for estimation of HRs for different levels of occupational physical activity in relation to the risk of myocardial infarction. Results During a mean follow-up of 13.1 years, 249 cases of incident myocardial infarction were identified. In analyses adjusted for age, sex and socioeconomic status, participants standing and walking more than 50% of their working day had an HR of 1.13 (95% CI 0.83 to 1.54), compared with participants seated more than 50% of their working day. The corresponding HR for participants whose work included lifting or carrying was 0.86 (95% CI 0.59 to 1.24). Further adjustment did not alter the results. Stratified analyses resulted in a significantly decreased risk for young people whose work included lifting or carrying, HR 0.37 (95% CI 0.17 to 0.84), compared with younger persons who sat most of their working day. Conclusions No significant association between occupational physical activity and the risk of myocardial infarction was observed in the total group of employees in this study. Based on the results from this study, occupational physical activity in general does not seem to be enough for reducing the risk of myocardial infarction.

Place, publisher, year, edition, pages
2016. Vol. 6, no 10, e012692
Keyword [en]
physical activity, prospective study, work
National Category
Health Sciences
Identifiers
URN: urn:nbn:se:miun:diva-29140DOI: 10.1136/bmjopen-2016-012692ISI: 000391303200078PubMedID: 27697879Scopus ID: 2-s2.0-84990053557OAI: oai:DiVA.org:miun-29140DiVA: diva2:1040323
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Available from: 2016-10-27 Created: 2016-10-27 Last updated: 2017-02-10Bibliographically approved

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CiteExportLink to record
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