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Self-Report Measure of Low Back-Related Biomechanical Exposures: Clinical Validation

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Abstract

Low back pain and symptoms are major contributors to ambulatory visits, economic burden, and reduced readiness among military personnel and employers in the civilian workplace as well. While a link between low back pain and biomechanical exposures has been established, efficient surveillance methods of such exposures are still needed. Furthermore, the utility of self-report measures for biomechanical exposures has not been examined extensively. The present cross-sectional study analyzed questionnaire data from US Army soldiers (n = 279) working in previously identified occupational specialties that were associated with high risk for low back pain and/or low back pain disability. Demographic characteristics, physical workload, health behaviors, and psychosocial factors were assessed in addition to self-reported workplace biomechanical exposures using the Job Related Physical Demands (JRPDs). Outcomes included self-reported low back pain severity, low back symptoms, functional limitations, and general physical health. The results indicated that the self-report measure of biomechanical exposure had a high degree of internal consistency (Cronbach alpha, 0.95). The JRPD index correlated with low back symptoms, pain intensity, function, and perceived work load using the Borg scale. Regression analyses indicated statistically significant associations between the JRPD and back pain specific pain severity and physical function, but not for general physical health (SF-12) after controlling for age, gender, educational level, job type, and reported exercise and work stress. Specifically, higher JRPD scores (representing greater biomechanical exposure) were associated with higher levels of pain intensity and functional limitations. Higher JRPD scores were found to place an individual at a greater likelihood for being a case with low back pain within the past 12 months (OR = 1.01 per point increase in scale-95%; range 38–152; CI = 1.00–1.02, p ≤ 0.05). While future longitudinal studies of the JRPD determining the predictive validity of the measure are needed, the present study provides evidence of the utility of the JRPD for assessing biomechanical exposures associated with low back pain within high-risk jobs. The findings suggest that the JRPD may assist with surveillance efforts and be useful as a process and/or outcome measure in research related to occupational rehabilitation.

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Authors and Affiliations

  1. US Army Center for Health Promotion and Preventive Medicine, Aberdeen, Maryland

    Colleen Daniels & Mary Lopez

  2. Cooperative Studies Program, U.S. Department of Veterans Affairs, Columbia, Washington

    Grant D. Huang

  3. Uniformed Services University of the Health Sciences, Bethesda, Maryland

    Grant D. Huang & Michael Feuerstein

  4. Georgetown University Medical Center, Columbia, Washington

    Michael Feuerstein

  5. Uniformed Services University, 4301 Jones Bridge Road, Bethesda, Maryland, 20814

    Michael Feuerstein

Authors
  1. Colleen Daniels
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  2. Grant D. Huang
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  3. Michael Feuerstein
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  4. Mary Lopez
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Correspondence to Michael Feuerstein.

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Daniels, C., Huang, G.D., Feuerstein, M. et al. Self-Report Measure of Low Back-Related Biomechanical Exposures: Clinical Validation. J Occup Rehabil 15, 113–128 (2005). https://doi.org/10.1007/s10926-005-1214-z

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