Validez y confiabilidad del instrumento de calidad de vida de Betty Ferrell en español, para personas con enfermedad crónica.

The instruments used to assess quality of life are useful tools that should provide real, safe and adequate information to promote programs, diagnose situations, to evaluate treatments, among others. Therefore must follow psychometric validity and reliability processes that allow its use in the local context, showing that measures what it purports to measure with a high degree of accuracy. Objective: To determine the validity and reliability of the Betty Ferrell's quality of life instrument, for people with Chronic disease, for Colombian context, by conducting psychometric tests. Methods: Descriptive study of cross-sectional quantitative approach. It was conducted; facial, content and construct validity was made, reliability for internal consistency using Cronbach's alpha. Results: The instrument adequate content validity with 0.9, internal consistency using Cronbach's alpha was 0.88, it was adequate. Regarding construct validity: factorial analysis only 22 of the 41 items are explained by the underlying dimension factor raised by the author, showing marked discrepancy in the dimensions of Psychological and Social Welfare. Conclusions: The quality of life instrument Betty Ferrell for people with chronic disease requires further study construct validity, it is recommended to delete items and perform a confirmatory factor analysis. [ABSTRACT FROM AUTHOR]