RESUMEN
BACKGROUND: Work Ability Score (WAS) is a common instrument for assessing work ability but its validity in assessing presenteeism and productivity loss is unknown. AIMS: To validate a WAS-based measure, the Presenteeism Scale (PS), and to evaluate its accuracy as a presenteeism instrument among forestry employees. METHODS: This validation study was based on questions of perceived WAS assessed using the Work Ability-Personal Radar (WA-PR) instrument and on questions of perceived productivity loss and presenteeism assessed using a cross-sectional questionnaire survey. Pearson's correlation test was used to ascertain the associations between variables. The association of productivity loss with presenteeism was evaluated using a logistic regression model. The predictive ability of presenteeism was tested using the receiver-operating characteristic curve. RESULTS: There were 339 respondents in the cross-sectional survey, 257 in the WA-PR and 107 respondents participating in both surveys. The prevalence of presenteeism was 48%. Presenteeism was significantly (P < 0.05) higher among those reporting productivity losses. Presenteeism is extremely accurate in predicting perceived productivity loss but less accurate in predicting PS-based productivity loss. The odds ratio (OR) of self-estimated productivity loss was 77 times higher (OR 77.39, 95% confidence interval [CI] 25.36-236.12) among those with presenteeism. Correspondingly, OR of productivity loss based on the PS was three times higher (OR 3.05, 95% CI 1.16-8.04). CONCLUSIONS: The PS may be a valid tool for predicting productivity loss and may be as good as other instruments. However, further research is needed to improve its accuracy.
