Short term influence of mechanical factors on regional musculoskeletal pain: a study of new workers from 12 occupational groups

OBJECTIVES To determine the influence of short term exposure to mechanical factors on regional musculoskeletal pain. METHODS Full time newly employed workers were recruited from 12 occupational groups and information collected by questionnaire. Subjects indicated on a blank body manikin any low back, shoulder, wrist or forearm or both, or knee pain which had occurred during the past month and had lasted more than 1 day. Data were also collected with a previously validated questionnaire on working postures, manual handling activities, and repetitive movements of the upper limb. The relations between mechanical factors and each area of pain were calculated as odds ratios (ORs) with 95% confidence intervals (95% CIs). Adjustment was made for age and sex. RESULTS 1081 subjects (median age 23; interquartile range 20–27) were recruited to the study (a participation rate of 91%). 261 (24%) reported low back pain, 221 (20%) shoulder pain, 93 (9%) wrist or forearm pain, and 222 (21%) knee pain. Several specific manual handling activities were found to be associated with low back, shoulder, and knee pain. Carrying weights of more than 50 lbs (23 kg) on one shoulder was the factor which was most strongly associated with low back pain (OR 2.4 (95% CI 1.5 to 3.8)), shoulder pain (OR 3.1 (95% CI 1.9 to 4.8)), and knee pain (OR 3.5 (95% CI 2.2 to 5.5)), whereas forearm pain was most strongly associated with repetitive movements of the wrists (OR 1.8 (95% CI 1.04 to 3.1)). By contrast very few postures were associated with regional pain, although bending forwards in an uncomfortable position for at least 15 minutes was associated with shoulder pain (OR 1.6 (95% CI 1.2 to 2.2)) and kneeling for at least 15 minutes was associated with knee pain (OR 1.8 (95% CI 1.2 to 2.6)). Exposure to mechanical factors was most strongly associated with pain at multiple sites rather than with pains in individual regions. CONCLUSIONS Even among workers with only short term exposure to mechanical factors, musculoskeletal pain is increased.

[1]  L. Manchikanti.  Epidemiology of low back pain. , 2000, Pain physician.

[2]  K Ohlsson,et al.  Fish processing work: the impact of two sex dependent exposure profiles on musculoskeletal health. , 1999, Occupational and environmental medicine.

[3]  A. Silman,et al.  Validity of a self-completed questionnaire measuring the physical demands of work. , 1998, Scandinavian journal of work, environment & health.

[4]  Association Between Measures of Spinal Mobility and Low Back Pain: An Analysis of New Attenders in Primary Care , 1998, Spine.

[5]  Y. Xu,et al.  Work environment and low back pain: the influence of occupational activities. , 1997, Occupational and environmental medicine.

[6]  D Coggon,et al.  Occupational physical activity and long-term risk of musculoskeletal symptoms: a national survey of post office pensioners. , 1997, American journal of industrial medicine.

[7]  M I Jayson,et al.  Employment and Physical Work Activities as Predictors of Future Low Back Pain , 1997, Spine.

[8]  A. Silman,et al.  Occupational factors related to shoulder pain and disability. , 1997, Occupational and environmental medicine.

[9]  H. Heuer,et al.  Musculoskeletal problems in bricklayers as a function of length of employment: The role of secondary selection by low-back pain , 1996 .

[10]  E. Viikari-Juntura,et al.  Validity of self-reported physical work load in epidemiologic studies on musculoskeletal disorders. , 1996, Scandinavian journal of work, environment & health.

[11]  G. Schierhout,et al.  Is self-reported pain an appropriate outcome measure in ergonomic-epidemiologic studies of work-related musculoskeletal disorders? , 1996, American journal of industrial medicine.

[12]  T. Skov,et al.  Psychosocial and physical risk factors for musculoskeletal disorders of the neck, shoulders, and lower back in salespeople. , 1996, Occupational and environmental medicine.

[13]  C. Bombardier,et al.  Classification systems of soft tissue disorders of the neck and upper limb: do they satisfy methodological guidelines? , 1996, Journal of clinical epidemiology.

[14]  J A Johansson,et al.  Psychosocial work factors, physical work load and associated musculoskeletal symptoms among home care workers. , 1995, Scandinavian journal of psychology.

[15]  H Sakakibara,et al.  Overhead work and shoulder-neck pain in orchard farmers harvesting pears and apples. , 1995, Ergonomics.

[16]  R S Bridger,et al.  Work related musculoskeletal disorders and ergonomic stressors in the South African workforce. , 1995, Occupational and environmental medicine.

[17]  J B Carter,et al.  Musculoskeletal problems in VDT work: a review. , 1994, Ergonomics.

[18]  M Szpalski,et al.  Sociocultural factors and back pain. A population-based study in Belgian adults. , 1994, Spine.

[19]  V. H. Hildebrandt,et al.  Psychosocial factors at work and musculoskeletal disease. , 1993, Scandinavian journal of work, environment & health.

[20]  D. Coggon,et al.  Interaction of height and mechanical loading of the spine in the development of low-back pain. , 1991, Scandinavian journal of work, environment & health.

[21]  S. Linton,et al.  Risk factors for neck and back pain in a working population in Sweden , 1990 .

[22]  M. Blaxter.  Health and lifestyles , 1990 .

[23]  S Tola,et al.  Low-Back Pain and Occupation: A Cross-Sectional Questionnaire Study of Men in Machine Operating, Dynamic Physical Work, and Sedentary Work , 1989, Spine.

[24]  B. Nilsson,et al.  Shoulder pain in middle age. A study of prevalence and relation to occupational work load and psychosocial factors. , 1988, Clinical orthopaedics and related research.

[25]  Anil Mital,et al.  The ergonomics of working postures: by Nigel Corlett, John Wilson and Ilija Manenica (Eds.), Taylor & Francis, Ltd., London and Philadelphia, 1986, ISBN 0-85066-338-5, 429 pages including references and subject index. , 1988 .

[26]  R. B. Margolis,et al.  Test-retest reliability of the pain drawing instrument , 1988, Pain.

[27]  M. Hagberg,et al.  Prevalence rates and odds ratios of shoulder-neck diseases in different occupational groups. , 1987, British journal of industrial medicine.

[28]  G. Andersson,et al.  Low‐Back Pain in 40− to 47‐Year-Old Men: Work History and Work Environment Factors , 1983, Spine.

[29]  L HULT,et al.  Cervical, dorsal and lumbar spinal syndromes; a field investigation of a non-selected material of 1200 workers in different occupations with special reference to disc degeneration and so-called muscular rheumatism. , 1954, Acta orthopaedica Scandinavica. Supplementum.