Validity of the Katz Index to assess activities of daily living by informants in neuropathological studies
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Data
2015-12-01
Autores
Lucena Ferretti-Rebustini, Renata Eloah de
Abaide Balbinotti, Marcos Alencar
Jacob-Filho, Wilson
Rebustini, Flavio [UNESP]
Suemoto, Claudia Kimie
Goncalves Pasqualucci, Carlos Augusto
Farfel, Jose Marcelo
Paraizo Leite, Renata Elaine
Grinberg, Lea Tenenholz
Nitrini, Ricardo
Título da Revista
ISSN da Revista
Título de Volume
Editor
Univ Sao Paolo
Resumo
Objective: To analyze the evidences of construct validity of the Katz Index for the retrospective assessment of activities of daily living (ADL) by informants, to assist neuropathological studies in the elderly. Method: A cross-sectional study analyzed the functional ability of ADL measure by the Katz Index, of 650 cases randomly selected from the Brazilian Brain Bank of the Ageing Brain Study Group (BBBABSG) database. Sample was divided in two subsamples for the analysis (N=325, each) and then stratified according to cognitive decline assessed by the Clinical Dementia Rating Scale (CDR). Factor analyses with calculations of internal consistency and invariance were performed. Results: Factor analysis evidenced a unidimensional instrument with optimal internal consistency, in all subgroups. Goodness of fit indices were obtained after two treatments of covariance, indicating adequacy of the scale for assessing ADL by informants. The scale is invariant to cognitive decline meaning that it can be used for subjects with or without cognitive impairment. Conclusion: Katz Index is valid for the retrospective assessment of basic ADL by informants, with optimal reliability.
Descrição
Palavras-chave
Activities of Daily Living, Aging, Proxy, Psychometrics, Validation Studies
Como citar
Revista Da Escola De Enfermagem Da Usp. Cerquera Cesar: Univ Sao Paolo, v. 49, n. 6, p. 944-950, 2015.