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

J Pediatr (Rio J). 2018 Nov-Dec;94(6):680-688. doi: 10.1016/j.jped.2017.09.009. Epub 2017 Nov 14.


Objective: The aim of the present study was to create a translated version of the Pediatric Quality of Life Inventory™ 3.0 Diabetes Module (PedsQL™ 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 (α=0.85) and their parents (α=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™ 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.

Keywords: Adolescent; Adolescente; Child; Criança; Diabetes mellitus tipo 1; Estudos de validação; Qualidade de vida; Quality of life; Type 1 diabetes mellitus; Validation studies.

Publication types

  • Validation Study

MeSH terms

  • Adolescent
  • Age Factors
  • Brazil
  • Caregivers
  • Child
  • Child, Preschool
  • Cross-Cultural Comparison
  • Diabetes Mellitus, Type 1 / physiopathology*
  • Diabetes Mellitus, Type 1 / psychology
  • Female
  • Humans
  • Language
  • Male
  • Parents
  • Pediatrics*
  • Psychometrics
  • Quality of Life*
  • Reference Values
  • Reproducibility of Results
  • Self Report / standards*
  • Time Factors
  • Translations*