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Published on: June 12, 2017
[Reliability and validity of Comprehensive Work Ability Index scales]
Lei Zhang1, Zhi-Ming Wang, Mian-Zhen Wang
1Hangzhou Center for Disease Control and Prevention, Hangzhou 310006, China.
Summary
The Comprehensive Work Ability Index (CWAI) scales demonstrate strong reliability and validity for assessing work ability across diverse occupations. These psychometric findings support its use in occupational health research and practice.
Area of Science:
- Occupational Health
- Psychometrics
- Workplace Assessment
Background:
- Work ability is crucial for employee well-being and productivity.
- Existing assessment tools require rigorous validation for diverse occupational settings.
Purpose of the Study:
- To evaluate the reliability and validity of the Comprehensive Work Ability Index (CWAI) scales.
- To establish CWAI as a dependable measure of work ability.
Main Methods:
- Random cluster sampling of 1959 employed subjects across various occupations.
- Test-retest reliability assessed on 245 subjects over 2-4 weeks.
- Criterion validity examined using 86 subjects and Pearson correlation analysis.
Main Results:
- High internal consistency (Cronbach's alpha, theta, Omega coefficients) and test-retest reliability (intra-class correlation).
- Satisfactory content validity and significant concurrent validity (ICC=0.650) against WAI scales.
- Factor analysis confirmed construct validity with 8 factors explaining 71.894% variance.
Conclusions:
- The Comprehensive Work Ability Index (CWAI) scales are confirmed as reliable and valid instruments.
- CWAI is suitable for assessing work ability in a broad range of occupational contexts.
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