Validation of the Revised Strain Index for Predicting Risk of Incident Carpal Tunnel Syndrome in a Prospective Cohort

Details

• Personal Author:
  Bao SS ; Hegmann KT ; Kapellusch JM ; Malloy EJ ; Merryweather AS ; Thiese MS
• Description:
  The Revised Strain Index (RSI), a model that quantifies physical exposure from individual hand/wrist exertions, tasks, and multi-task jobs, was used to quantify exposure for 1372 incident-eligible manufacturing, service and healthcare workers. Workers were followed for an average of 2.5 years (maximum 6 years) and had an average carpal tunnel syndrome (CTS) incidence rate of 4.6 per 100 person-years. Exceeding the a-priori RSI limit of 10.0 showed increased risk of CTS (Hazard Ratio (HR) = 1.45, 95% CI: 1.11-1.91, p = 0.01). There also was a dose-response relationship using proposed low (RSI ≤ 8.5, HR = 1.00), medium (HR = 1.42 (95% CI: 0.96-2.09, p = 0.08)), and high limits (RSI > 15, HR = 1.79 (95% CI: 1.19-2.69, p = 0.01), respectively. RSI as a continuous variable showed CTS risk increased steadily by between 1.9% and 3.3% per unit increase in RSI (p ≤ 0.03). These results suggest that the RSI is a useful tool for surveillance as well as for job intervention/design and continuous improvement processes. Practitioner Summary: The Revised Strain Index (RSI) quantifies physical exposure from individual hand/wrist exertions, tasks, and multi-task jobs. Increased cumulative RSI scores (i.e. daily exposure score) are associated with increased risk of carpal tunnel syndrome (CTS). The RSI is potentially useful as a risk surveillance and intervention design tool. [Description provided by NIOSH]
• Subjects:
  Biomechanical Phenomena Cohort Studies Ergonomics Musculoskeletal Diseases Musculoskeletal System Occupational Health Safety
• Keywords:
  Author Keywords: Risk Assessment Biomechanics Carpal Tunnel Syndrome Cohort Studies CTS Exposure Measurement Job Design Job Rotation MSD Musculoskeletal System Disorders Risk Assessment Surveillance

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• ISSN:
  0014-0139
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  District of Columbia ; OSHA Region 10 ; OSHA Region 3 ; OSHA Region 5 ; OSHA Region 8 ; Utah ; Washington ; Wisconsin
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  64
• Issue:
  11
• NIOSHTIC Number:
  nn:20068005
• Citation:
  Ergonomics 2021 Nov; 64(11):1369-1378
• Contact Point Address:
  Jay M. Kapellusch, Department of Rehabilitation Sciences & Technology, College of Health Sciences, University ofWisconsin-Milwaukee, Milwaukee, WI, USA
• Email:
  kap@uwm.edu
• Federal Fiscal Year:
  2022
• Performing Organization:
  University of Wisconsin, Milwaukee
• Peer Reviewed:
  True
• Start Date:
  20130901
• Source Full Name:
  Ergonomics
• End Date:
  20170831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:d0141d2d50d39c2293163c3d6ccd0db0f57f0427891c5c3a252fd190bc17ebbe291833afa62b145c6c931eafb00418e27946bea47a31596abd73eaf96cf07eac
• Download URL:
  https://stacks.cdc.gov/view/cdc/230236/cdc_230236_DS1.pdf
• File Type:
  [PDF - 1.91 MB ]