alexa Cross-sectional associations between occupational and leisure-time sitting, physical activity and obesity in working adults.
Mathematics

Mathematics

Journal of Biometrics & Biostatistics

Author(s): Chau JY, van der Ploeg HP, Merom D, Chey T, Bauman AE

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Abstract AIM: To examine associations between occupational and leisure-time sitting, physical activity and obesity in working adults. METHODS: We analyzed data from workers from the 2007-08 Australian National Health Survey (n=10,785). Participants reported their activity at work (mostly sitting, standing, walking, or heavy labor), transport-related walking, leisure-time sitting and physical activity. Body mass index was objectively measured. Adjusted Cox proportional hazard regression models examined associations between occupational activity category, leisure-time sitting, physical activity and obesity risk. RESULTS: Substantial proportions of men (42\%) and women (47\%) mostly sit at work. Workers with sitting jobs were significantly more likely to be sufficiently active during leisure-time than workers with mostly standing, walking or heavy labor jobs (RR=0.88, 0.80, 0.86 respectively). Workers with mostly sitting jobs had significantly higher overweight/obesity risk than workers with mostly standing jobs (RR=0.88, 95\% CI: 0.82-0.95) independent of physical activity and leisure-time sitting. Workers with leisure-time sitting of less than four hours per day had significantly lower obesity risk than workers with four or more hours per day of leisure-time sitting (RR=0.77, 95\%CI: 0.69-0.87) independent of physical activity and occupational activity. CONCLUSIONS: Sitting time and physical activity are independently associated with obesity. Leisure-time sitting may have a stronger association with obesity risk than occupational sitting. Copyright © 2011 Elsevier Inc. All rights reserved. This article was published in Prev Med and referenced in Journal of Biometrics & Biostatistics

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