Rasch analysis of the Katz index of independence in activities of daily living in senior citizens from Antioquia, Colombia
Fiche du document
2019
- handle: 10670/1.2udvc3
- 0120-386X
Ce document est lié à :
http://www.redalyc.org/revista.oa
Revista Facultad Nacional de Salud Pública
Sujets proches
Older persons Older adults Seniors (Older people) Elderly people Old people Senior citizens Aging people AgedCiter ce document
Diego Fernando Rojas-Gualdrón et al., « Rasch analysis of the Katz index of independence in activities of daily living in senior citizens from Antioquia, Colombia », Revista Facultad Nacional de Salud Pública, ID : 10670/1.2udvc3
Métriques
Partage / Export
Résumé
"Objective: To evaluate the validity of the Katz geriatric scale in senior citizens from a Rasch model perspective. Methodology: Secondary data analysis of a population-based, cross-sectional study of health status in 4,023 senior citizens conducted in Antioquia, Colombia, in 2012. Item fit, differential item functioning, unidimensionality, reliability and item-person map analyses were performed. Results: All items adjusted to the model. Transferring and Continence showed high differential item functioning with a considerable, but statistically non-significant impact on the overall estimation. Person and Item reliability were 0.80 and 0.90 respectively. The Rasch measurement explained 61.6% of variance. Conclusion: A unidimensional interval level measure can be obtained from the Katz instrument. It is important to do more research on differential functioning of Katz’s items in a way in which validity arguments on its generalization to various subpopulations could be strengthened and score interpretability could be improved."