<abstract xmlns="http://www.w3.org/1999/xhtml"><sec><h3>Aim</h3><p>To assess the psychometric properties of the Croatian version of a Work Ability Index Questionnaire (WAIQ-CRO) in the population of nurses by using a specific methodological approach.</p></sec><sec><h3>Methods</h3><p>A cross-sectional survey was conducted in a sample of 711 Croatian nurses in 2018 in Zagreb, Croatia. The instrument’s internal consistency was assessed by using Cronbach’s alpha coefficient (α). The factor structure was verified by confirmatory (CFA) and exploratory factor analysis (EFA), with the assumption of a single-factor structure. To ensure the equality of importance of items in the assessment, the item-specific scores were transformed.</p></sec><sec><h3>Results</h3><p>The internal consistency of the instrument was satisfactory (α=0.71). CFA showed poor first model (Model-1) compatibility data (p&lt;0.001, CFI=0.85, GFI=0.93, RMSEA=0.13). The modificated indexes suggested the introduction of correlation parameters residual variances of results from WAIQ-CRO Item-1 and Item-2. After introducing these covariances, the index model assentation (Model-2) showed desirable assentation measures (p&lt;0.001, CFI=0.95, GFI=0.97, RMSEA=0.08). Comparison showed better compatibility of Model-2 (p&lt;0.001). The implementation of EFA has identified three factors. Replication of this model in CFA resulted in relatively good model assentation approaches with data (p&lt;0.001, CFI=0.96, GFI=0.98, RMSEA=0.07). Comparison of this model (Model-3) with Model-2 showed a significantly better compatibility of Model-3 (p&lt;0.001).</p></sec><sec><h3>Conclusion</h3><p>The WAIQ-CRO proved to be a reliable and valid instrument which can be used in research among Croatian nurses. The results suggest that it would be better to consider a three-factor structure than a single-factor structure, as a three-factor structure can direct decision-makers to which segment to locate interventions.</p></sec></abstract>

AimTo assess the psychometric properties of the Croatian version of a Work Ability Index Questionnaire (WAIQ-CRO) in the population of nurses by using a specific methodological approach.MethodsA cross-sectional survey was conducted in a sample of 711 Croatian nurses in 2018 in Zagreb, Croatia. The instrument’s internal consistency was assessed by using Cronbach’s alpha coefficient (α). The factor structure was verified by confirmatory (CFA) and exploratory factor analysis (EFA), with the assumption of a single-factor structure. To ensure the equality of importance of items in the assessment, the item-specific scores were transformed.ResultsThe internal consistency of the instrument was satisfactory (α=0.71). CFA showed poor first model (Model-1) compatibility data (p<0.001, CFI=0.85, GFI=0.93, RMSEA=0.13). The modificated indexes suggested the introduction of correlation parameters residual variances of results from WAIQ-CRO Item-1 and Item-2. After introducing these covariances, the index model assentation (Model-2) showed desirable assentation measures (p<0.001, CFI=0.95, GFI=0.97, RMSEA=0.08). Comparison showed better compatibility of Model-2 (p<0.001). The implementation of EFA has identified three factors. Replication of this model in CFA resulted in relatively good model assentation approaches with data (p<0.001, CFI=0.96, GFI=0.98, RMSEA=0.07). Comparison of this model (Model-3) with Model-2 showed a significantly better compatibility of Model-3 (p<0.001).ConclusionThe WAIQ-CRO proved to be a reliable and valid instrument which can be used in research among Croatian nurses. The results suggest that it would be better to consider a three-factor structure than a single-factor structure, as a three-factor structure can direct decision-makers to which segment to locate interventions.

Validation of the Croatian Version of Work Ability Index (WAI) in Population of Nurses on Transformed Item-Specific Scores

Clinical Institute of Occupational Medicine

Faculty of Medicine, Chair of Public Health

Slovenian Journal of Public Health

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

OVREDNOTENJE HRVAŠKE RAZLIČICE INDEKSA DELOVNE SPOSOBNOSTI V POPULACIJI MEDICINSKIH SESTER NA PREOBLIKOVANIH REZULTATIH, SPECIFIČNIH ZA POSAMEZNO POSTAVKO

AimTo assess the psychometric properties of the Croatian version of a Work Ability Index Questionnaire (WAIQ-CRO) in the population of nurses by using a...

Validation of the Croatian Version of Work Ability Index (WAI) in Population of Nurses on Transformed Item-Specific Scores

Article Category: Original scientific article

Published Online: Apr 06, 2020

Page range: 57 - 64

Received: Jul 19, 2019

Accepted: Dec 18, 2019

DOI: https://doi.org/10.2478/sjph-2020-0008

Keywords
psychometric properties, work ability index questionnaire, validation, nurses, occupational health

© 2020 Martina Smrekar et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Validation of the Croatian Version of Work Ability Index (WAI) in Population of Nurses on Transformed Item-Specific Scores

Article Category: Original scientific article

Published Online: Apr 06, 2020

Page range: 57 - 64

Received: Jul 19, 2019

Accepted: Dec 18, 2019

DOI: https://doi.org/10.2478/sjph-2020-0008

Keywordspsychometric properties, work ability index questionnaire, validation, nurses, occupational health

© 2020 Martina Smrekar et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
psychometric properties, work ability index questionnaire, validation, nurses, occupational health