Association between lifting and use medication for low back pain: results from the backworks prospective cohort study.
Kapellusch-JM; Garg-A; Boda-S; Hegmann-KT; Moore-JS; Thiese-MS; Merryweather-A; Tomich-S; Foster-JC; Bloswick-D; Malloy-EJ
J Occup Environ Med 2014 Aug; 56(8):867-877
Objective: To evaluate relationships between lifting and lowering of loads and risk of low back pain resulting in medication use (M-LBP). Methods: At baseline, worker demographics, psychosocial factors, hobbies, LBP history, and lifting and lowering (quantified using the Revised NIOSH Lifting Equation) were assessed. A cohort of 258 incident-eligible workers was followed up for 4.5 years to determine new M-LBP cases and changes in lifting/lowering requirements. Proportional hazards regression with time-varying covariates was used to model associations. Results: Factors predicting M-LBP included peak lifting index (PLI) and composite lifting index (PCLI), LBP history, anxiety, and housework. In adjusted models, PLI and PCLI showed exposure-response relationships with peak hazard ratios of 3.8 and 4.3, respectively (P = 0.02). Conclusions: Lifting of loads is associated with increased risk of M-LBP. The PLI and PCLI are useful metrics for estimating the risk of M-LBP from lifting.
Humans; Men; Women; Musculoskeletal-system; Musculoskeletal-system-disorders; Back-injuries; Exposure-levels; Risk-factors; Workers; Injuries; Demographic-characteristics; Sociological-factors
Jay M. Kapellusch, PhD, Department of Occupational Science and Technology, University of Wisconsin-Milwaukee, PO Box 413, Milwaukee, WI 53201
Cooperative Agreement; Grant
Cooperative-Agreement-Number-U01-OH-008083; Grant-Number-T42-CCT-810426; M082014
Journal of Occupational and Environmental Medicine
University of Wisconsin Milwaukee