The Revised Strain Index: an improved upper extremity exposure assessment model

Details

• Personal Author:
  Garg, Arun ; Kapellusch JM ; Moore, J. Steven
• Description:
  The Revised Strain Index (RSI) is a distal upper extremity (DUE) physical exposure assessment model based on: intensity of exertion, frequency of exertion, duration per exertion, hand/wrist posture, and duration of task per day. The RSI improves upon the 1995 Strain Index (SI) by using continuous rather than categorical multipliers and replacing duty cycle with duration per exertion. In a simulation of 13,944 tasks, the RSI and 1995 SI showed good agreement in risk predictions for 1995 SI score ≤ 3 ('safe') and > 13.5 ('hazardous'). For tasks with 1995 SI scores of > 3 and ≤ 13.5, the two models showed marked disagreement, with the RSI providing much greater discriminations between 'safe' and 'hazardous' tasks for various combinations of force, repetition and duty cycle. We believe the RSI is a substantially improved model that will be useful for DUE task analysis, intervention, and design. Practitioner Summary: Revised Strain Index (RSI) is a substantial improvement over 1995 Strain Index. It should be a valuable tool for designing and analyzing tasks to determine risk of musculoskeletal injuries. RSI is applicable to a wide variety of tasks including very low force and very high repetition tasks such as keyboard use. Description provided by NIOSH
• Subjects:
  • Environmental Exposure
  • Musculoskeletal Diseases
  • Musculoskeletal System
  • Occupational Health
  • Risk Assessment
  • Risk Factors
  • Safety
• Keywords:
  • Upper extremities
  • Extremities
  • Exposure levels
  • Exposure assessment
  • Models
  • Physical fitness
  • Posture
  • Risk factors
  • Risk assessment
  • Safety
  More +
• ISSN:
  0014-0139
• Document Type:
  Text
• Funding:
  Grant ; Cooperative Agreement
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 5 ; OSHA Region 6 ; Texas ; Wisconsin
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  60
• Issue:
  7
• NIOSHTIC Number:
  nn:20048657
• Citation:
  Ergonomics 2017 Jul; 60(7):912-922
• Email:
  arun@uwm.edu
• Federal Fiscal Year:
  2017
• Performing Organization:
  University of Wisconsin, Milwaukee
• Peer Reviewed:
  True
• Start Date:
  20130901
• End Date:
  20170831
• Download URL:
  https://stacks.cdc.gov/view/cdc/203365/cdc_203365_DS1.pdf
• File Type:
  [PDF - 1.08 MB]
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:24b53164699a96265766eeeb0616991c4b6d1523803f68164c17ffdf08edb81a344086fd41a84a642a44486f241e0335112265ba71a536df56070869b84b338e