OBJECTIVE: To translate into Portuguese the contents of the questionnaire for adaptation assessment of dietary and physical activity changes proposed by Sutton et al, to be used with adolescents; and to verify the internal consistency and reliability of this tool. METHODS: The content validation was accomplished by a multidisciplinary group, which was consulted after the translation and back translation of the instrument in order to generate a coherent version, followed by the cultural adaptation performed using a Likert's scale, from which adolescents assessed clarity and relevance of each statement. The reliability and internal consistency of the tool were assessed by a questionnaire applied to 32 obese adolescents of both genders from a multiprofessional program for obesity treatment. They had, on average, 13.5±1.59 years old and 86.1±18.8kg. The Cronbach's alpha coefficient was used to assess the internal consistency, as well as Pearson, Spearman and intraclass correlation coefficients. Also the t-test was used to assess reliability. RESULTS: The results of test and retests revealed the high reliability of the tool. Internal consistency showed good reliability rates for all areas, with all values higher than or near to 0.70. CONCLUSIONS: The questionnaire presented good internal consistency and reliability in obese adolescents. However, it is appropriate to carry out further studies in order to confirm the external validity of the instrument.
adolescent; obesity; feeding behavior; motor activity; validation studies
