A prospective study of musculoskeletal outcomes among manufacturing workers: I. Effects of physical risk factors

Details

• Personal Author:
  Anton D ; Fethke N ; Gerr F ; Jones MP ; Marcus M ; Merlino L ; Meyers A ; Rosecrance J
• Description:
  Objective: To better characterize associations between physical risk factors and upper-extremity musculoskeletal symptoms and disorders, a prospective epidemiologic study of 386 manufacturing workers was performed. Background: Methodological limitations of previous studies have resulted in inconsistent associations. Method: An individual, task-based exposure assessment strategy was used to assess upper-extremity exertion intensity, repetition, and time-in-posture categories. Participants recorded time spent performing daily work tasks on a preprinted log, which was then used to calculate time-weighted-average exposures across each week of follow-up. In addition, a weekly Strain Index (SI) risk category was assigned to each participant. Incident musculoskeletal symptoms and disorders were assessed weekly. Proportional hazards analyses were used to examine associations between exposure measures and incident hand/arm and neck/shoulder symptoms and disorders. Results: Incident symptoms and disorders were common (incident hand/arm symptoms = 58/100 person-years (PY), incident hand/arm disorders = 19/100 PY, incident neck/shoulder symptoms = 54/100 PY, incident neck/shoulder disorders = 14/100 PY). Few associations between separate estimates of physical exposure and hand/arm and neck/shoulder outcomes were observed. However, associations were observed between dichotomized SI risk category and incident hand/arm symptoms (hazard ratio [HR] = 1.73, 95% confidence interval [CI] = [0.99, 3.04]) and disorders (HR = 1.93, 95% CI = [0.85, 4.40]). Conclusion: Evidence of associations between physical risk factors and musculoskeletal outcome was strongest when exposure was estimated with the SI, in comparison to other metrics of exposure. Application: The results of this study provide evidence that physical exposures in the workplace contribute to musculoskeletal disorder incidence. Musculoskeletal disorder prevention efforts should include mitigation of these occupational risk factors. [Description provided by NIOSH]
• Subjects:
  Environmental Exposure Epidemiology Men Musculoskeletal Diseases Musculoskeletal System Occupational Health Risk Assessment Risk Factors Safety Women
• Keywords:
  Author Keywords: Manufacturing Workers Epidemiological Study Exposure Levels Humans Musculoskeletal Musculoskeletal System Musculoskeletal System Disorders Occupational Health Physical Capacity Physiological Effects Physiology Posture Repetitive Work Risk Factor Risk Factors Statistical Analysis Time Weighted Average Exposure Workers

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• ISSN:
  0018-7208
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Colorado ; Georgia ; Iowa ; Ohio ; OSHA Region 10 ; OSHA Region 4 ; OSHA Region 5 ; OSHA Region 7 ; OSHA Region 8 ; Washington
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DSHEFS - Division of Surveillance, Hazard Evaluations, and Field Studies
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  112-130
• Volume:
  56
• Issue:
  1
• NIOSHTIC Number:
  nn:20042910
• Citation:
  Hum Factors 2014 Feb; 56(1):112-130
• Contact Point Address:
  Fred Gerr, Department of Occupational and Environmental Health, College of Public Health, University of Iowa, 105 River Street, CPHB S322, Iowa City, IA 52242
• Email:
  fred-gerr@uiowa.edu
• Federal Fiscal Year:
  2014
• Performing Organization:
  University of Iowa - Iowa City
• Peer Reviewed:
  True
• Start Date:
  20030901
• Source Full Name:
  Human Factors
• End Date:
  20080831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:78077bd6aa3bd19f1639bc84405d6941e50eb08dcc84f6b505258c2d9c7659fecf87755fa603acdf7b5a7b64ccdf1632f8f469cb002ba072341f729ca686c960
• Download URL:
  https://stacks.cdc.gov/view/cdc/194978/cdc_194978_DS1.pdf
• File Type:
  [PDF - 541.24 KB ]