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Ergonomics considerations in hand and wrist tendinitis.

Authors
Armstrong TJ; Fine LJ; Goldstein SA; Lifshitz YR; Silverstein BA
Source
J Hand Surg 1987 Sep; 12(5):830-837
NIOSHTIC No.
00174688
Abstract
In a cross sectional study, undertaken to evaluate the relationship between repetitiveness, forcefulness, and selected cumulative trauma disorders of the hand and wrist, a total of 652 workers were studied for de Quervain's disease, trigger finger, tendinitis, and tenosynovitis. Workers were selected from jobs with four combinations of force and repetitiveness in seven types of work (electronics, sewing, appliance, bearing fabrication, bearing assembly, and investment molding). Jobs with a cycle time less than 30 seconds or which involved performing the same motion for over 50 percent of the cycle time were classified as high repetitive (HR); low repetitive (LR) jobs had cycle times over 30 seconds and involved performing the same motion less than 50 percent of the cycle time. Jobs with estimated average hand force requirements over 40 newtons were considered high force (HF); jobs with estimated average hand force requirements below 10 newtons were considered low force (LF). Standardized interviews and noninvasive physical examinations were conducted for the subjects. Forty five workers fulfilled the criteria for tendinitis in the interview, and 29 workers with hand/wrist tendinitis were identified by physical examination and the interview. Prevalence of hand/wrist tendinitis by force and repetitiveness ranged from 0.6 percent in the LF/LR jobs to 10.8 percent in the HF/HR jobs. Overall prevalence was significantly higher in females (7.8 percent) than in males (1.7 percent). Significant differences in posture between males and females were observed. The authors conclude that there is a highly significant association between recognized signs and symptoms of hand/wrist tendinitis and repetitiveness and forcefulness of manual work.
Keywords
NIOSH-Publication; NIOSH-Contract; Contract-200-82-2507; Clinical-diagnosis; Nervous-system-disorders; Skeletal-disorders; Ergonomics; Medical-examinations; Sex-factors; Neuromotor-system-disorders; Occupational-health; Workplace-studies; Repetitive-work; Hand-injuries; Musculoskeletal-system-disorders
Contact
Thomas J. Armstrong; Ph.D., The Department of Environmental and Industrial Health, The University of Michigan, Ann Arbor, MI 48109
CODEN
JHSUDV
Publication Date
19870901
Document Type
Journal Article
Funding Type
Contract
Fiscal Year
1987
Identifying No.
Contract-200-82-2507
Issue of Publication
5
ISSN
0363-5023
Priority Area
Musculoskeletal System Disorders
Source Name
Journal of Hand Surgery
State
MI
Performing Organization
The University of Michigan, Ann Arbor, Michigan
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division