Biomechanical, psychosocial and individual risk factors predicting low back functional impairment among furniture distribution employees.

BACKGROUND Biomechanical, psychosocial and individual risk factors for low back disorder have been studied extensively however few researchers have examined all three risk factors. The objective of this was to develop a low back disorder risk model in furniture distribution workers using biomechanical, psychosocial and individual risk factors. METHODS This was a prospective study with a six month follow-up time. There were 454 subjects at 9 furniture distribution facilities enrolled in the study. Biomechanical exposure was evaluated using the American Conference of Governmental Industrial Hygienists (2001) lifting threshold limit values for low back injury risk. Psychosocial and individual risk factors were evaluated via questionnaires. Low back health functional status was measured using the lumbar motion monitor. Low back disorder cases were defined as a loss of low back functional performance of -0.14 or more. FINDINGS There were 92 cases of meaningful loss in low back functional performance and 185 non cases. A multivariate logistic regression model included baseline functional performance probability, facility, perceived workload, intermediated reach distance number of exertions above threshold limit values, job tenure manual material handling, and age combined to provide a model sensitivity of 68.5% and specificity of 71.9%. INTERPRETATION The results of this study indicate which biomechanical, individual and psychosocial risk factors are important as well as how much of each risk factor is too much resulting in increased risk of low back disorder among furniture distribution workers.

[1]  B Vällfors,et al.  Acute, subacute and chronic low back pain: clinical symptoms, absenteeism and working environment. , 1985, Scandinavian journal of rehabilitation medicine. Supplement.

[2]  G. Andersson.  Epidemiologic Aspects on Low-Back Pain in Industry , 1981, Spine.

[3]  H. Groeller,et al.  Short-duration fatigue alters neuromuscular coordination of trunk musculature: implications for injury. , 2003, Applied ergonomics.

[4]  Paul D. Williams,et al.  A user's guide to the General Health Questionnaire , 1988 .

[5]  W. G. Allread,et al.  The Influence of Psychosocial Stress, Gender, and Personality on Mechanical Loading of the Lumbar Spine , 2000, Spine.

[6]  William S Marras,et al.  Revised protocol for the kinematic assessment of impairment. , 2004, The spine journal : official journal of the North American Spine Society.

[7]  S. Linton,et al.  Do psychological factors increase the risk for back pain in the general population in both a cross‐sectional and prospective analysis? , 2005, European journal of pain.

[8]  C. Heaney,et al.  The relationship between psychosocial work characteristics and low back pain: underlying methodological issues. , 2000, Clinical biomechanics.

[9]  J A Johansson,et al.  Risk indicators in the psychosocial and physical work environment for work-related neck, shoulder and low back symptoms: a study among blue- and white-collar workers in eight companies. , 1994, Scandinavian journal of rehabilitation medicine.

[10]  Georgios Merekoulias,et al.  Musculoskeletal Disorders among Cosmetologists , 2009, International journal of environmental research and public health.

[11]  A Magora,et al.  Investigation of the relation between low back pain and occupation. V. Psychological aspects. , 1973, Scandinavian journal of rehabilitation medicine.

[12]  William S. Marras,et al.  Prevalence of Low Back Disorders in Furniture Distribution Centers , 2008 .

[13]  Leo Breiman,et al.  Classification and Regression Trees , 1984 .

[14]  K M Tillotson,et al.  Do attitudes and beliefs influence work loss due to low back trouble? , 1996, Occupational medicine.

[15]  J. Dennerlein,et al.  Association between psychosocial factors and musculoskeletal symptoms among Iranian nurses. , 2010, American journal of industrial medicine.

[16]  Stefania Curti,et al.  Relations between occupational, psychosocial and individual factors and three different categories of back disorder among supermarket workers , 2005, International archives of occupational and environmental health.

[17]  William S Marras,et al.  Low Back Pain Recurrence in Occupational Environments , 2007, Spine.

[18]  A Magora.  Investigation of the relation between low back pain and occupation. , 1970, IMS, Industrial medicine and surgery.

[19]  J. Caro,et al.  A systematic review of low back pain cost of illness studies in the United States and internationally. , 2008, The spine journal : official journal of the North American Spine Society.

[20]  Basia Belza,et al.  Health and safety risk at a skilled nursing facility. Nursing assistants' perceptions. , 2003, Journal of gerontological nursing.

[21]  W S Marras,et al.  Biomechanical risk factors for occupationally related low back disorders. , 1995, Ergonomics.

[22]  W. Marras,et al.  The future of research in understanding and controlling work-related low back disorders , 2005, Ergonomics.

[23]  William S. Marras,et al.  Differences Among Outcome Measures in Occupational Low Back Pain , 2005, Journal of Occupational Rehabilitation.

[24]  John W. Cherrie,et al.  Does risk perception affect behaviour and exposure? A pilot study amongst asbestos workers. , 1998 .

[25]  B. Bernard,et al.  Musculoskeletal disorders and workplace factors: a critical review of epidemiologic evidence for work-related musculoskeletal disorders of the neck, upper extremity, and low back , 1997 .

[26]  M J Schrandt,et al.  The family as a resource for nursing homes. , 1976, Journal of gerontological nursing.

[27]  J D Troup,et al.  Back Pain in Industry: A Prospective Survey , 1981, Spine.

[28]  W. Marras,et al.  Quantitative Dynamic Measures of Physical Exposure Predict Low Back Functional Impairment , 2010, Spine.

[29]  W. Marras,et al.  The ACGIH TLV for Low Back Risk , 2006 .

[30]  S. Kumar,et al.  Theories of musculoskeletal injury causation , 2001, Ergonomics.

[31]  Panel on Musculoskeletal Disorders.  Musculoskeletal disorders and the workplace , 2013 .

[32]  K. Harms-Ringdahl,et al.  Psychosocial job factors and symptoms from the locomotor system--a multicausal analysis. , 2020, Scandinavian journal of rehabilitation medicine.

[33]  W S Marras,et al.  A literature review of low back disorder surveillance measures and risk factors. , 1997, Clinical biomechanics.

[34]  D B Chaffin,et al.  A longitudinal study of low-back pain as associated with occupational weight lifting factors. , 1973, American Industrial Hygiene Association journal.

[35]  Walter F. Stewart,et al.  Back Pain Exacerbations and Lost Productive Time Costs in United States Workers , 2006, Spine.

[36]  H Bergenudd,et al.  Back Pain in Middle Age; Occupational Workload and Psychologic Factors: An Epidemiologic Survey , 1988, Spine.

[37]  A. J. Stewart-Taylor,et al.  Does risk perception affect behaviour and exposure? A pilot study amongst asbestos workers. , 1998, The Annals of occupational hygiene.

[38]  Steven A. Lavender,et al.  Developing Physical Exposure-Based Back Injury Risk Models Applicable to Manual Handling Jobs in Distribution Centers , 2012, Journal of occupational and environmental hygiene.

[39]  William S. Marras.  The Working Back: A Systems View , 2008 .

[40]  J. Freburger,et al.  The rising prevalence of chronic low back pain. , 2009, Archives of internal medicine.

[41]  J. Hurrell,et al.  Exposure to job stress--a new psychometric instrument. , 1988, Scandinavian journal of work, environment & health.

[42]  C. Hamrick,et al.  Costs by industry and diagnosis among musculoskeletal claims in a state workers compensation system: 1999-2004. , 2009, American journal of industrial medicine.

[43]  D G Wilder,et al.  Epidemiologic Studies of Low-Back Pain , 1980, Spine.

[44]  J. Y. Kim,et al.  The quantification of low back disorder using motion measures. Methodology and validation. , 1999, Spine.

[45]  C G Drury,et al.  Accurate movement of two-probe components. , 1995, Ergonomics.

[46]  D. Spengler,et al.  Back Injuries in Industry: A Retrospective Study: III. Employee-related Factors , 1986, Spine.

[47]  William S. Marras,et al.  Quantification of a Meaningful Change in Low Back Functional Impairment , 2009, Spine.