Document Detail

Reliability and validity assessment of the hand activity level threshold limit value and strain index using expert ratings of mono-task jobs.
MedLine Citation:
PMID:  18286422     Owner:  NLM     Status:  MEDLINE    
This study evaluated two subjective assessment methods for physical work-related musculoskeletal disorder (WMSD) risk factors. A total of 567 participants from 12 companies in the manufacturing and health care industries were evaluated using the hand activity level (HAL) threshold limit value (TLV) and the Strain Index. Inter-rater reliability comparisons were performed on 125 selected cyclic tasks, with one novice and three experienced raters. Predictive validity was assessed by evaluation of relationships between measured exposure parameters and diagnosed WMSDs of the hand/wrist and elbow. HAL hand repetition ratings had a Spearman r value of 0.65 and a kappa value of 0.44 between raters. Subjective force (0-10 scale) estimates had a Spearman r = 0.28 and were not significantly different between raters (p > .05). The rating comparison for the four subjective components of the Strain Index had Spearman r correlations of 0.37-0.62 and kappa values of 0.25-0.44. The Strain Index and HAL TLV agreed on exposure categorization 56% of the time. Logistic regression showed, after adjustment for age, gender, and body mass index, that higher peak hand force estimates (odds ratio [OR] 1.14, confidence interval (CI) 1.02-1.27), most common force estimates (OR 1.14, CI 1.02-1.28), hand/wrist posture rating (OR 1.71, CI 1.15-2.56), and Strain Index scores >/= 7 (OR 1.82, CI 1.04-3.18) were associated with distal upper extremity disorders in the dominant hand. HAL repetition ratings >/= 4 (OR 2.81, CI 1.40-5.62) and hand/wrist posture ratings (OR 1.59, CI 1.01-2.49) were associated with disorders in the nondominant hand. These findings show moderate to good inter-rater agreement and significant relationships to health outcomes for the identified measures.
Peregrin Spielholz; Stephen Bao; Ninica Howard; Barbara Silverstein; Joyce Fan; Caroline Smith; Carolyn Salazar
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.; Validation Studies    
Journal Detail:
Title:  Journal of occupational and environmental hygiene     Volume:  5     ISSN:  1545-9632     ISO Abbreviation:  J Occup Environ Hyg     Publication Date:  2008 Apr 
Date Detail:
Created Date:  2008-02-20     Completed Date:  2008-03-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101189458     Medline TA:  J Occup Environ Hyg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  250-7     Citation Subset:  IM    
SHARP Program, Washington Department of Labor and Industries, Olympia, Washington 98504, USA.
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MeSH Terms
Cumulative Trauma Disorders / diagnosis,  etiology*
Ergometry / methods
Hand / physiopathology*
Middle Aged
Musculoskeletal Diseases / diagnosis,  etiology*
Observer Variation
Occupational Diseases / diagnosis,  etiology*
Odds Ratio
Risk Assessment / methods
Sensitivity and Specificity
Task Performance and Analysis*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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