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Occupational Risk Factors and Back Injury

Craig B. N., Congleton J. J., Beier E., Kerk C. J., Amendola A. A., Gaines W. G.

International Journal of Occupational Safety and Ergonomics

2013

Vol. 19, No. 3

335--345

Twenty-one risk factors affecting laborers in manual materials handling tasks were analyzed to determine what, if any, statistically significant relationships existed between the factors and the emergence of occupational back injury. The statistically significant risk factors (p ≤.05) in the univariate analysis were determined to be weight lifted per hour (work intensity), trunk twists per hour, weight lifted per day, frequency of lift, trunk motions per hour, and trunk flexions per hour, with odds ratios (ORs) of 1.28-2.88. In addition, self-reported discomfort in the neck, middle back, knees, and lower back was associated with the outcome of back injury (p ≤.05, OR 1.75-2.66). In the multivariate analysis, the statistically significant risk factors (p ≤.05) were weight lifted per hour (work intensity), average weight of lift, and number of trunk twists per hour, with ORs of 1.74-4.98.