Impact of physical exposure on neck and upper limb disorders in female workers.

Physical workload [muscular load of the trapezius and infraspinatus muscles using electromyography (EMG), wrist positions and movements by electrogoniometers] and neck and upper limb disorders (from, for example, a physical examination) were studied in women with repetitive industrial work (n = 95) and referents (n = 74). The repetitive work displayed higher ratings for wrist movements, but not for EMG. The prevalences of neck, shoulder and wrist/hand disorders were elevated for women with repetitive work [age-adjusted prevalence odds ratios (PORs) 2.0-7.5]. For the left hand, high frequency of wrist movements (mean power frequency 0.53 Hz) was associated with a high prevalence of disorders (56%), as compared to low (0.28 Hz and 26%; POR 3.5). We found no consistent and significant effect of muscular load, on either neck or shoulder disorders. However, selection and other bias may have diminished our possibility to observe such effects. Psychosocial work environment factors were not confounding the results. Measurements of wrist movements may be used for identification of high-risk work tasks.

[1]  L. Forcier,et al.  Work related musculoskeletal disorders (WMSDs) : a reference book for prevention , 1995 .

[2]  A. Undén.  Social support at work and its relationship to absenteeism , 1996 .

[3]  Jacques Malchaire,et al.  Relationship between work constraints and the development of musculoskeletal disorders of the wrist: A prospective study , 1997 .

[4]  K Ohlsson,et al.  Interindividual variation of physical load in a work task. , 1999, Scandinavian journal of work, environment & health.

[5]  R G Attewell,et al.  Repetitive industrial work and neck and upper limb disorders in females. , 1995, American journal of industrial medicine.

[6]  R. H. Westgaard,et al.  Ergonomic intervention research for improved musculoskeletal health: A critical review , 1997 .

[7]  Kaj Bo Veiersted,et al.  Sustained muscle tension as a risk factor for trapezius myalgia , 1994 .

[8]  K Ohlsson,et al.  Absence attributed to incapacity and occupational disease/accidents among female and male workers in the fish-processing industry. , 1998, Occupational medicine.

[9]  M. Stål,et al.  Wrist positions and movements as possible risk factors during machine milking. , 1999, Applied ergonomics.

[10]  G M Hägg,et al.  Normalization of surface EMG amplitude from the upper trapezius muscle in ergonomic studies - A review. , 1995, Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology.

[11]  R H Westgaard,et al.  Development of trapezius myalgia among female workers performing light manual work. , 1993, Scandinavian journal of work, environment & health.

[12]  T J Armstrong,et al.  Hand wrist cumulative trauma disorders in industry. , 1986, British journal of industrial medicine.

[13]  Melhorn Jm.  Cumulative trauma disorders and repetitive strain injuries. The future. , 1998 .

[14]  R G Attewell,et al.  An assessment of neck and upper extremity disorders by questionnaire and clinical examination. , 1994, Ergonomics.

[15]  K Ohlsson,et al.  Goniometer measurement and computer analysis of wrist angles and movements applied to occupational repetitive work. , 1996, Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology.

[16]  T. Armstrong,et al.  Occupational factors and carpal tunnel syndrome. , 1987, American journal of industrial medicine.

[17]  U. Moritz,et al.  Low Back and Neck/Shoulder Pain in Construction Workers: Occupational Workload and Psychosocial Risk Factors , 1992, Spine.

[18]  B. Jonsson,et al.  Standardised Nordic questionnaires for the analysis of musculoskeletal symptoms. , 1987, Applied ergonomics.

[19]  J. Winkel,et al.  Occupational and individual risk factors for shoulder-neck complaints: Part II — The scientific basis (literature review) for the guide , 1992 .

[20]  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 .

[21]  S. Skerfving,et al.  Quantifying work load in neck, shoulders and wrists in female dentists , 1997, International archives of occupational and environmental health.

[22]  K Ohlsson,et al.  Disorders of the neck and upper limbs in women in the fish processing industry. , 1994, Occupational and environmental medicine.

[23]  U. Moritz,et al.  Low back and neck/shoulder pain in construction workers: occupational workload and psychosocial risk factors. Part 1: Relationship to low back pain. , 1992, Spine.

[24]  W S Marras,et al.  Wrist motions in industry. , 1993, Ergonomics.

[25]  W. Marras,et al.  Occupational risk factors associated with soft tissue disorders of the shoulder: a review of recent investigations in the literature. , 1993, Ergonomics.

[26]  J. Melhorn.  Cumulative trauma disorders and repetitive strain injuries. The future. , 1998, Clinical orthopaedics and related research.

[27]  K. B. Veiersted,et al.  Reliability of myoelectric trapezius muscle activity in repetitive light work. , 1996, Ergonomics.

[28]  R H Westgaard,et al.  A case-control study of trapezius muscle activity in office and manual workers with shoulder and neck pain and symptom-free controls , 1995, International archives of occupational and environmental health.

[29]  Robert Karasek,et al.  Healthy Work : Stress, Productivity, and the Reconstruction of Working Life , 1990 .