PROPRIEDADES PSICOMÉTRICAS DA VERSÃO BRASILEIRA DO INSTRUMENTO KIDSCREEN-27 PARA AVALIAÇÃO DA QUALIDADE DE VIDA DE CRIANÇAS

Abstract

The objective of this study was to test the psychometric properties of the Brazilian version of KIDSCREEN-27 measurement instrument of quality of life of children and teenagers. The Spearman correlation coefficient was used for the calculation of validity of criteria. Due to the fact that the data shower a non-normal distribution, and the correlations were significant in all the dimensions (p<0,001). This way, we infer that the KIDSCREEN-27 instrument presented satisfactory quality. The internal consistency was calculated using the Cronbach’s alpha coefficient and out of the seven analyzed items, five of them achieved values above 0.7. It follows that the Brazilian version of the KIDSCREEN-27 instrument is capable to gather high-quality information, similar to the ones from the versions concerning quality of life of children and teenagers. What pertains the concurring validity, using the AUQEI instrument as “gold standard”, significative correlations were obtained regarding Spearman’s correlation coefficient. This way, it appears that the KIDSCREEN-27 instrument presents satisfactory concurrent validity regarding the AUQEI instrument. In terms of the test-retest reliability, the Spearman’s correlation calculation was again employed. There were no significative differences concerning the average of the dimensions in terms of the test and retest, hence leading to a satisfactory stability of the aforementioned instrument. Pertaining the discriminant validity, a significant difference could be found in the comparison of children from regular schools and children who grew up in orphanages, especially in the dimensions Physical Well-being, Autonomy and Parents, and School Environment. As for the Split-Half calculation, the correlation was satisfactory, with a value of 0.727, which reinforces even more the reliability of the KIDSCREEN-27 instrument. We concluded that the psychometric properties of the Brazilian version of KIDSCREEN-27 instrument presented, in general, satisfactory conditions, thus creating another possibility of investigation for researches and professionals to assess the quality of life of Brazilian children and teenagers.