Physical and mental strain at work: Relationships with onset and persistent of multi-site pain in a four-year follow up |
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| Affiliation: | 1. School of Health Sciences, FI – 33014, University of Tampere, Tampere, Finland;2. Gerontology Research Center, FI – 33014, University of Tampere, Finland;1. Department of Economics, Management and Industrial Engineering (DEGEI), University of Aveiro, 3810-193 Aveiro, Portugal;2. Department of Physics (DFIS), Research Center in Teaching and Technology in Training of Trainers (CIDTFF), University of Aveiro, 3810-193 Aveiro, Portugal;3. Department of Economics, Management and Industrial Engineering (DEGEI), Institute of Electronics and Telematics Engineering of Aveiro (IEETA), University of Aveiro, 3810-193 Aveiro, Portugal;1. Colorado State University, Environmental and Radiological Health Sciences Department, 1681 Campus Delivery, Fort Collins, CO 80523, USA;2. Universita'' Degli Studi di Sassari, Dipartimento di Agraria, Viale Italia, 39 - 07100 Sassari, Italy;1. Department of Occupational and Environmental Health, School of Public Health, Peking University, Beijing 100191, China;2. Beijing Center for Disease Prevention and Control, Beijing 100013, China;1. Industrial and Operations Engineering Department, University of Michigan, Ann Arbor, MI, 48109, United States;2. University of Michigan Transportation Research Institute, Ann Arbor, MI, 48109, United States |
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| Abstract: | This study evaluates the association of physical and mental strain with the onset and persistence of multi-site musculoskeletal pain among younger and older employees in four-year follow-up. A questionnaire survey was conducted twice in a food processing company, in 2005 and 2009, with responses from 734 employees (445 younger and 289 older; 65% female). Information on musculoskeletal pain during the preceding week and perceived mental and physical strain was obtained through a structured questionnaire. The association of onset and persistent of multi-site pain with mental and physical strain was estimated with log binomial regression analysis and stratified by age group. Risk ratios (RR) with their 95% confidence intervals (CIs) are reported for the estimates. More than 56% of the employees reported multi-site pain at baseline. Among those who reported multi-site pain at baseline 70% reported persistent multi-site pain and one-third reported new onset of multi-site pain at follow-up. Mental strain at baseline strongly predicted persistence of multi-site pain among both younger and older employees (RR from for younger employees = 1.68, 95% CI = 1.01–2.83 and RR for older employees = 2.25, 95% CI 0 1.27–3.98) but the association with physical strain was not statistically significant. Mental strain predicted the risk of persistence of multi-site pain among both younger and older employees in four-year follow-up but not onset of multi-site pain.Relevance to the industryThe results of this study suggest that monitoring working conditions of all age workers can reduce physical and mental strain, thereby reducing the incidence of multi-site musculoskeletal pain and promoting workers' health. |
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| Keywords: | Musculoskeletal pain Multi-site pain Mental strain Physical strain |
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