BACKGROUND: Brain tumors are the most common type of pediatric cancer, significantly impacting children's health-related quality of life (HRQoL). This study aimed to adapt the PedsQL METHOD: A total of 108 children with brain tumors (mean age: 9.1 ± 4.99 years) and 120 parents participated in the study. The translation process included forward-backward translation, reconciliation, cognitive debriefing, and pilot testing. Internal consistency (Cronbach's alpha), test-retest reliability (ICC), exploratory and confirmatory factor analysis were conducted to evaluate the psychometric properties. Correlations between the PedsQL RESULTS: Cronbach's alpha ranged from 0.83 to 0.97, indicating excellent internal consistency. Test-retest reliability was robust, with ICC values exceeding 0.80 for most subscales. EFA explained 84.2% of the variance in parent reports and 80.4% in child reports, while CFA confirmed the six-factor structure (child-reported outcomes: RMSEA = 0.069, 90% CI: 0.061-0.076
TLI = 0.862
NFI = 0.92
χ CONCLUSIONS: The Turkish PedsQL