OBJECTIVE: Obtain a Portuguese version of the Kiddo-KINDL questionnaire that is semantic and culturally equivalent to the original version. METHODS: For the adaptation, the methodology of direct and inverse translation was used. The questionnaire was applied to groups from three schools in Uberlândia, MG - Brazil, and comprised of 378 children and adolescents aged between 12 and 16. 16% of the students were randomly selected to repeat the test. In the statistical analysis, the following aspects were appraised and analyzed such as: lost data, floor and ceiling effect, internal consistence of the item and reliability of the internal consistence of the scales. RESULTS: The percentage of lost data in the scales was low varying between 1.6% to 2.57%, which indicates good acceptability of the questionnaire. The rates of floor and ceiling effect were lower than 12% suggesting that the instrument is sensitive to detect differences in quality of life related to the health of the children and adolescents ranked within the extreme ends. The Kiddo-KINDL as a whole has shown high reliability (Alpha Cronbach = 0.79). CONCLUSION: The Kiddo-KINDL is a reliable tool to be used with children and adolescents in Brazil, and has provided important data of multidimensional nature.
Reliability; Questionnaire; Quality of life; Validation studies; Adolescents; Reproducibility of results
