Translation and validation of Pediatric Quality of Life Inventory (TM) 3.0 Diabetes Module (PedsQL (TM) 3.0 Diabetes Module) in Brazil-Portuguese language

Abstract

Objective: The aim of the present study was to create a translated version of the Pediatric Quality of Life Inventory (TM) 3.0 Diabetes Module (PedsQL (TM) 3.0 Diabetes Module) in Brazilian Portuguese that was conceptually equivalent to the original American English version and to linguistically validate it in a Brazilian pediatric population with type 1 diabetes mellitus and their parents or caregivers. Methods: The instrument was translated, back-translated, and then administered to 83 children/adolescents (5-18 years) with type 1 diabetes mellitus and their family members and to 25 parents/caregivers of patients aged between 2 and 4 years. The final translated version was tested for reliability by analyzing internal consistency, intraobserver (test-retest) reliability, and concurrent validity. Results: Cronbach's alpha coefficient for the total score of the questionnaires of children/adolescents (alpha = 0.85) and their parents (alpha = 0.82) was above the recommended minimum of 0.70 for group comparisons. Intraobserver reliability and concurrent validity exhibited a significant positive correlation (p < 0.001), indicating the reliability of the translated instrument. A moderate but significant positive correlation (r = 0.40; p < 0.001) was demonstrated between the total scores of patient self-report and parent proxy-report scales. There was no significant correlation between glycated hemoglobin (HbA1c) levels and the respective scores in the questionnaires answered by patients and their parents/caregivers. Conclusion: The analysis of the translated version of the PedsQL (TM) 3.0 Diabetes Module revealed adequate psychometric characteristics with respect to reliability and validity following administration to a sample of Brazilian children/adolescents with type 1 diabetes mellitus and their caregivers. (C) 2018 Sociedade Brasileira de Pediatria.