O38-2 Influence from individual factors on self-reported standing/walking at work when controlled for job exposures assessed by the lower body jem. (1st September 2016)

• Record Type: Journal Article
• Authors: Rubak, Tine Steen; Hansson, Gert-Åke; Holtermann, Andreas; Svendsen, Susanne Wulff; Frost, Poul; Andersen, Johan Hviid; Dalbøge, Annett; Gupta, Nidhi
• Is Part Of: Occupational and environmental medicine. Volume 73(2016)Supplement 1
• Page Start: A72
• Page End: A73
• Publication Date: 2016-09-01
• Subjects: Medicine, Industrial -- Periodicals; Environmental health -- Periodicals; 616.980305
• DOI: 10.1136/oemed-2016-103951.195
• Languages: English
• ISSNs: 1351-0711

Abstract

Abstract : Aim: In this study we assessed the influence of individual factors on self-reported exposures from The Danish Work and Health Study 2012 (DWHS2012) when controlled for job exposures assessed by The Lower Body JEM. 1 Methods: We used multiple linear regression. The outcome was self-reported hours per day spent standing/walking according to DWHS2012. Predictors were corresponding expert based exposure estimates from The Lower Body JEM, which covers 499 Danish ISCO-88 (DISCO-88) codes, and general health, low back pain, work ability, body mass index, and smoking according to DWHS 2012. Results: There were 5973 observations with both self-reported and JEM-based exposures (3261 men, 2712 women). The JEM explained 15% of the variance of the self-reported standing/walking. The crude regression equation between JEM-based and self-reported standing/walking was: self-reported exposure in hours = 1.13 hours + 0.75 JEM exposure in hours. Non-smokers/ex-smokers, those reporting better work ability and those without low back pain underestimated their exposure by 0.2 hours, 0.3 hours, and 0.3 hours, respectively. People with low self-reported health overestimated their exposure by 0.1 hour. The full model accounted for 17.4% of the variability in self-reported estimates of standing/walking. Conclusion: The JEM explained 15% of the variance of the self-reported standing/walking, and other factors contributed to a very small degree. Studies using self-reported standing/walking at work are likely to provide different results regarding health associations than studies using observed or objectively measured exposures, and should be used and interpreted with care. Reference: Rubak TS, Svendsen SW, Andersen JH, Haahr JP, Kryger A, Jensen LD, et al . An expert-based job exposure matrix for large scale epidemiologic studies of primary hip and knee osteoarthritis: the Lower Body JEM. BMC Musculoskelet Disord2014;15:204.