Karen Allesøe1,2, Andreas Holtermann3,4, Reiner Rugulies4,5,6, Mette Aadahl7,5, Eleanor Boyle3,8, Karen Søgaard3. 1. Department of Sports Science and Clinical Biomechanics, Faculty of Health Sciences, University of Southern Denmark, Campusvej 55, 5230, Odense M, Denmark. karen.allesoee@regionh.dk. 2. Research Centre for Prevention and Health, Centre for Health, Rigshospitalet-Glostrup, Copenhagen University, Copenhagen, Denmark. karen.allesoee@regionh.dk. 3. Department of Sports Science and Clinical Biomechanics, Faculty of Health Sciences, University of Southern Denmark, Campusvej 55, 5230, Odense M, Denmark. 4. National Research Centre for the Working Environment, Copenhagen, Denmark. 5. Department of Public Health, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark. 6. Department of Psychology, Faculty of Social Sciences, University of Copenhagen, Copenhagen, Denmark. 7. Research Centre for Prevention and Health, Centre for Health, Rigshospitalet-Glostrup, Copenhagen University, Copenhagen, Denmark. 8. Dalla Lana School of Public Health, University of Toronto, Toronto, Canada.
Abstract
PURPOSE: To investigate whether influence at work modifies the association between demanding and strenuous occupational physical activity (OPA) and risk of ischaemic heart disease (IHD). METHODS: A sample of 12,093 nurses aged 45-64 years from the Danish Nurse Cohort Study was followed for 20.6 years by individual linkage to incident IHD in the Danish National Patient Registry. Information on OPA, influence at work, other occupational factors and known risk factors for IHD was collected by self-report in 1993. RESULTS: During follow-up 869 nurses were hospitalised with incident IHD. Nurses exposed to strenuous OPA and low influence at work had a 46% increased risk of IHD [hazard ratio (HR) 1.46 (95% confidence interval (CI) 1.02-2.09)] compared to the reference group of nurses with moderate OPA and high influence at work. Nurses exposed to strenuous OPA and high influence at work were not at an increased risk of IHD [HR 1.10 (95% CI 0.59-2.06)]. An additive hazards model showed there were 18.0 (95% CI -0.01 to 36.0) additional cases of IHD per 10,000 person years among nurses with strenuous OPA and low influence at work compared to nurses with moderate OPA and high influence at work. A detrimental additive interaction between strenuous OPA and low influence at work that could explain the additional cases of IHD among nurses with strenuous OPA and low influence at work was indicated. CONCLUSION: The findings suggest that high influence at work may buffer some of the adverse effects of strenuous OPA on risk of IHD.
PURPOSE: To investigate whether influence at work modifies the association between demanding and strenuous occupational physical activity (OPA) and risk of ischaemic heart disease (IHD). METHODS: A sample of 12,093 nurses aged 45-64 years from the Danish Nurse Cohort Study was followed for 20.6 years by individual linkage to incident IHD in the Danish National Patient Registry. Information on OPA, influence at work, other occupational factors and known risk factors for IHD was collected by self-report in 1993. RESULTS: During follow-up 869 nurses were hospitalised with incident IHD. Nurses exposed to strenuous OPA and low influence at work had a 46% increased risk of IHD [hazard ratio (HR) 1.46 (95% confidence interval (CI) 1.02-2.09)] compared to the reference group of nurses with moderate OPA and high influence at work. Nurses exposed to strenuous OPA and high influence at work were not at an increased risk of IHD [HR 1.10 (95% CI 0.59-2.06)]. An additive hazards model showed there were 18.0 (95% CI -0.01 to 36.0) additional cases of IHD per 10,000 person years among nurses with strenuous OPA and low influence at work compared to nurses with moderate OPA and high influence at work. A detrimental additive interaction between strenuous OPA and low influence at work that could explain the additional cases of IHD among nurses with strenuous OPA and low influence at work was indicated. CONCLUSION: The findings suggest that high influence at work may buffer some of the adverse effects of strenuous OPA on risk of IHD.
Entities:
Keywords:
Heart disease; Influence at work; Occupational health; Physical activity; Prospective study; Women
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