Among the existing instruments for measurement the work ability stands out the Work Abilty Index. It was developed to measure how well a worker is or will be in the present or near future, and how capable this worker is of performing work given the demands of the job and the health status and mental and physical capabilities of the worker. The purpose of this study is evaluate some of psychometric properties of the Work Ability Index in nursing. The initial chapters present the revision bibliographic about studies focusing psychometric qualities of the Work Abilty Index and some concepts referents the some aspects of the psychometric qualities instruments. It also presents the objectives of this study and justified. The methods and results of the present study are presented in two papers. The first paper investigated the test-retest reliability of the Work Abilty Index in one sample composed of 80 nurses through the intra-class correlation coefficient, Kappa statistic and Bland and Altman graphic. In the second paper presents the construct validity and the reliability of the Work Abilty Index in the sample of 1436 nurses. In the construct validity was assessed dimensional structure through for the exploratory factorial analyses from the polychoric correlate matrix and the parallel analysis for the retention of the factors. In the construct validity also investigated the correlate of Work Abilty Index with the same theoretically relevant concepts in the literature about the theme thought of the calculus of the Spearman correlate. To assess the reliability, measure thought of internal consistence, we used Cronbach’s alpha and McDonald’s omega. The results showed appropriate test-retest reliability for the Work Abilty Index; the value of the intra-class correlation coefficient and the weighted Kappa showed substantial agreement (0,79 e 0,69, respectively). The Bland and Altman graphic showed that 95% of the differences between 1° and 2° measurement present among -6 and + 6 points, not show asystematic pattern between the two measures. The results of the Cronbach’s alpha and McDonald omega was, respectively 0,80 e 0,87. And the exclusion of any issue did not substantially affect the outcome of these. We identified two-dimensional structure explaining 52,8% of the accumulated variance for the principal components and 42,0% for the principal axis. The theoretical hypothesis assumptions of the construct validity were confirmed with significant and direct correlate of the Work Abilty Index with scores of the reward, control and Self-evaluation of the health state; correlated inversely and significantly with the Need for Recovery Scale, psychiatric disturbance, effort, overcommitment and demand. It was concluded that the Work Abilty Index, adapted and translated for the Portuguese, showed appropriates psychometric properties and it give the supports additional research in occupational health. |
