Confiabilidade e validade da versão brasileira do Child Perceptions Questionnaire: CPQ8-10

Abstract

Considering the importance of assessing the influence of oral health conditions on the quality of life of Brazilian children, the aim of the present study was to validate the Child Perceptions Questionnaire 8-10 (CPQ8-10) for use in Brazil. The sample was made up of 80 male and female children between eight and ten years of age from dental clinics of the Federal University of Minas Gerais for Measurement Equivalence. The interviews and clinical exams were performed by a single, previously calibrated examiner (Kappa =0.98-dental caries, weighted Kappa and intraclass correlation coefficient=0.66-1.00-malocclusion). The intraclass correlation coefficient (ICC) was uses for the test-retest assessment (40 children). Discriminant validity was assessed using the Kruskal-Wallis test. The assessment of the psychometric properties revealed that the measure is reliable (Cronbachs alpha = 0.92 for the total scale and 0.63-0.85 for the subscales) and exhibits excellent stability (ICC = 0.96 for the total scale and 0.79-0.95 for the subscales). Spearmans correlation demonstrated the construct validity, except for the social wellbeing subscale. There was a statistically significant difference in total, oral symptoms and emotional wellbeing scores between the groups studied, thereby demonstrating the discriminant validity (p=0.026; p=0.001; p=0.022). The Brazilian version of the CPQ8-10 proved valid and reliable for use on Brazilian children. The psychometric properties were similar to the original measure; functional equivalence was demonstrated, thereby allowing the use of the measure in epidemiological studies in Brazil.