The results support the potential utility of interventions targeting ergonomic, workplace and individual psychosocial risk factors in secondary prevention.
Over the past decade, studies have identified a combination of demographic, physical/medical, ergonomic, and psychosocial factors in the development of work disability related to occupational low back pain. Using such data on disability risk factors, investigators have begun to develop risk identification and disability prevention programs. As part of an ongoing effort to develop a secondary prevention program, the present case-control study identified the relative contribution of demographic, physical demand, physical fitness, as well as occupational and individual psychosocial variables to back-related work disability in the US Army. Soldiers (n = 174) diagnosed with a lumbosacral strain and medically discharged from the Army were compared with non-disabled controls (n = 173). Dependent measures were obtained from the US Army Health Risk Appraisal (HRA). For cases, these data pre-dated disability determination by 1 to 3 years. For controls, the HRA was completed during the same time period. Significant predictors of low back disability were: age (odds ratio [OR] = 1.13 per year), lower rank (E2/E3) (OR = 4.08/OR = 3.02), infrequent aerobic exercise (OR = 2.2), higher work stress (OR = 2.71), worries (OR = 2.17), and lower social support (OR = 5.07). The model correctly classified 73.13% of all subjects. These results highlight the importance of considering age, status level in the organization, frequency of aerobic exercise, occupational stress, general worries, and social support for the early detection of soldiers at increased risk for back-related disability. Additionally, the findings support past research indicating the multivariate nature of work disability and emphasize the importance of considering such factors in future secondary prevention efforts.
Musculoskeletal disorders represent a prevalent source of outpatient visits, lost work time, hospitalization, and disability in the military. Recent research has identified patterns among military occupations, gender, and musculoskeletal disability. Although back disorders accounted for a high percentage of all cases, little is known about the relationship between job type and disability in soldiers. The present study analyzed 41,750 disability cases to determine (1) prevalence of work-related back disability diagnoses, (2) specific jobs associated with greater risk of back disability, and (3) association among gender, job type, and disability. The results indicate that (1) lumbosacral strain and intervertebral disc syndrome represent the most prevalent diagnoses for back disability, (2) certain occupations were associated with higher back disability risk, and (3) specific jobs were identified in which females experienced higher rates of back disability than males. The nature of these high-risk jobs, and recent research on work disability factors in U.S. Army soldiers, suggest that a combination of ergonomic and individual/organizational psychosocial factors may play a role in the development, exacerbation, and maintenance of work disability. Future research that identifies specific job factors contributing to increased back disability risk should assist in the development of empirically based work site prevention programs to improve musculoskeletal health and readiness.
A number of ergonomic, workplace and individual psychosocial factors and health behaviors have been associated with the onset, exacerbation and/or maintenance of low back pain (LBP). The functional impact of these factors may be influenced by how a worker approaches problems in general. The present study was conducted to determine whether problem-solving orientation was associated with physical and mental health outcomes in fully employed workers (soldiers) reporting a history of LBP in the past year. The sample consisted of 475 soldiers (446 male, 29 female; mean age 24.5 years) who worked in jobs identified as high risk for LBP-related disability and reported LBP symptoms in the past 12 months. The Social Problem-Solving Inventory and the Standard Form-12 (SF-12) were completed by all subjects. Hierarchical multiple regression analyses were used to predict the SF-12 physical health summary scale from interactions of LBP symptoms with each of five problem-solving subscales. Low scores on positive problem-solving orientation (F(1,457)=4.49), and high scores on impulsivity/carelessness (F(1,457)=9.11) were associated with a steeper gradient in functional loss related to LBP. Among those with a longer history of low-grade LBP, an avoidant approach to problem-solving was also associated with a steeper gradient of functional loss (three-way interaction; F(1,458)=4.58). These results suggest that the prolonged impact of LBP on daily function may be reduced by assisting affected workers to conceptualize LBP as a problem that can be overcome and using strategies that promote taking an active role in reducing risks for LBP. Secondary prevention efforts may be improved by addressing these factors.
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