The Brazilian version of the Quality of Life in Epilepsy Inventory for Adolescents: Translation, validity, and reliability

ObjectiveThe aim of this study was to translate and adapt the Quality of Life in Epilepsy Inventory for Adolescents (QOLIE-AD-48) into Brazilian Portuguese, as well as to evaluate the psychometric properties of this Brazilian version.MethodsThe QOLIE-AD-48 Brazilian version was tested with respect to reliability and validity in 93 adolescents with epilepsy. Patients completed the Self-Esteem Inventory (SEI), Children’s Depression Evaluation Scale (CDES), and Adverse Events Profile (AEP). A subset of these patients were reexamined after 3–4 weeks to evaluate the test–retest reliability of the inventory. We assessed validity by comparing the QOLIE-AD-48 Brazilian version with external measures.ResultsInternal consistency was satisfactory (Cronbach’s α = 0.87). Test–retest reliability was acceptable as well (intraclass correlation coefficient = 0.52–0.81). Moreover, the QOLIE-AD-48 Brazilian version was highly correlated with other scales, demonstrating strong validity.ConclusionsWe conclude that the QOLIE-AD-48 Brazilian version has psychometric properties equivalent to those of the original American-English version and is a valid and reliable instrument for assessment of health-related quality of life in adolescents with epilepsy in Brazil or other Portuguese-speaking countries.