Objectives: The aim of this study was to investigate the association between multiple lifestyle-related risk factors (unhealthy diet, low leisure-time physical activity, overweight/obesity and smoking) and self-rated work ability in a general working population.

Setting: Population-based cross-sectional study, in Telemark County, Norway, 2013.

Participants: A random sample of 50 000 subjects was invited to answer a self-administered questionnaire and 16 099 responded. Complete data on lifestyle and work ability were obtained for 10 355 participants aged 18-50 years all engaged in paid work during the preceding 12 months.

Outcome Measure: Work ability was assessed using the Work Ability Score (WAS)-the first question in the Work Ability Index. To study the association between multiple lifestyle risk factors and work ability, a lifestyle risk index was constructed and relationships examined using multiple logistic regression analysis.

Results: Low work ability was more likely among subjects with an unhealthy diet (OR 1.3, 95% CI 1.02 to 1.5), inactive persons (OR 1.4, 95% CI 1.2 to 1.6), obese respondents (OR 1.5, 95% CI 1.3 to 1.7) and former and current smokers (OR 1.2, 95% CI 1.1 to 1.4 and 1.3, 95% CI 1.2 to 1.5, respectively). An additive relationship was observed between the lifestyle risk index and the likelihood of decreased work ability (moderate-risk score: OR 1.3; 95% CI 1.1 to 1.6; high-risk score: OR 1.9; 95% CI 1.6 to 2.2; very high risk score: OR 2.4; 95% CI 1.9 to 3.0). The overall population attributable fraction (PAF) of low work ability based on the overall risk index was 38%, while the PAFs of physical activity, smoking, body mass index and diet were 16%, 11%, 11% and 6%, respectively.

Conclusions: Lifestyle risk factors were associated with low work ability. An additive relationship was observed. The findings are considered relevant to occupational intervention programmes aimed at prevention and improvement of decreased work ability.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6500250PMC
http://dx.doi.org/10.1136/bmjopen-2018-026215DOI Listing

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