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JOURNAL ARTICLE
VALIDATION STUDIES
Identifying the loss of functional independence of older people residing in the community: Validation of the PRISMA-7 instrument in Brazil.
Archives of Gerontology and Geriatrics 2018 January
The identification of the older people who are functionally dependant is essential for planning interventions with emphasis on secondary and tertiary prevention. Therefore, a simplified tool, able to identify these individuals for a more comprehensive evaluation, is required. However, the use of a measuring tool in a different socio-cultural context requires prior adaptation. This article aims to verify the psychometric properties of the PRISMA-7 in Brazilian context. This instrument was previously shown as able to identify older persons living in the community who have risk of functional loss in a Canadian study. In a sample of 1748 older persons, the internal consistency assessed by Cronbach's alpha showed a borderline value credited to the reduced number of questionnaire items. Factor analysis identified two well correlated factors, except for items 2 and 6. For criterion validity the SMAF scale (French acronym, Functional Autonomy Measurement System) was used as the gold standard. The analysis of the ROC curve indicated a sensitivity of 74.4% and specificity of 87.4% for the cut-off point of 4, while the Canadian version had a cut-off point of 3 for disability detection. Inter and intra-observer reliability, investigated by the Kappa Cohen were high and statistically significant. In conclusion, the results suggest that the validation process was adequate, and recommend the Brazilian version of PRISMA-7, to track older people with functional loss in the community.
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