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A randomised controlled trial evaluating the effects of two workstation interventions on upper body pain and incident musculoskeletal disorders among computer operators.

Authors
Rempel-DM; Krause-N; Goldberg-R; Benner-D; Hudes-M; Goldner-GU
Source
Occup Environ Med 2006 May; 63(5):300-306
NIOSHTIC No.
20030074
Abstract
Call centre work with computers is associated with increased rates of upper body pain and musculoskeletal disorders. This one year, randomised controlled intervention trial evaluated the effects of a wide forearm support surface and a trackball on upper body pain severity and incident musculoskeletal disorders among 182 call centre operators at a large healthcare company. Participants were randomised to receive (1) ergonomics training only, (2) training plus a trackball, (3) training plus a forearm support, or (4) training plus a trackball and forearm support. Outcome measures were weekly pain severity scores and diagnosis of incident musculoskeletal disorder in the upper extremities or the neck/shoulder region based on physical examination performed by a physician blinded to intervention. Analyses using Cox proportional hazard models and linear regression models adjusted for demographic factors, baseline pain levels, and psychosocial job factors. Post-intervention, 63 participants were diagnosed with one or more incident musculoskeletal disorders. Hazard rate ratios showed a protective effect of the armboard for neck/shoulder disorders (HR = 0.49, 95% CI 0.24 to 0.97) after adjusting for baseline pain levels and demographic and psychosocial factors. The armboard also significantly reduced neck/shoulder pain (p = 0.01) and right upper extremity pain (p = 0.002) in comparison to the control group. A return-on-investment model predicted a full return of armboard and installation costs within 10.6 months. Providing a large forearm support combined with ergonomic training is an effective intervention to prevent upper body musculoskeletal disorders and reduce upper body pain associated with computer work among call centre employees.
Keywords
Musculoskeletal-system-disorders; Injuries; Workers; Worker-health; Ergonomics; Training; Back-injuries; Neck-injuries; Job-analysis; Occupational-health; Health-hazards; Models; Mathematical-models; Demographic-characteristics; Employees; Employee-health; Computers; Injury-prevention; Repetitive-work
Contact
Dr D Rempel, Department of Medicine, University of California, San Francisco, 1301 South 46th Street, Building 163, Richmond, CA 94804, USA
CODEN
OEMEEM
Publication Date
20060501
Document Type
Journal Article
Email Address
drempel@itsa.ucsf.edu
Funding Amount
754596
Funding Type
Grant
Fiscal Year
2006
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-004253
Issue of Publication
5
ISSN
1351-0711
Priority Area
Research Tools and Approaches: Intervention Effectiveness Research
Source Name
Occupational and Environmental Medicine
State
CA
Performing Organization
University of California-San Francisco, Richmond, California
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