Using person reported outcomes: Psychometric properties of the German diabetes treatment satisfaction questionnaire (DTSQ) for teens and parents

AimsTo examine psychometric properties including the factor structure of the German versions of the Diabetes Treatment Satisfaction Questionnaire for teens and parents (DTSQ-T/-P).MethodsLinguistically validated questionnaires were completed by 363 adolescents with type 1 diabetes and 655 parent-caregivers in a multicenter study. Confirmatory factor analysis (CFA), reliability, and correlations were examined.ResultsCFA confirmed the 2-factor model of treatment satisfaction (TS) & perceived diabetes control (PDC) with an adjustment of removing the "medical support" item from the TS and examining it as a single item in this study. Cronbach's α of TS for DTSQ-T/-P was 0.82 & 0.83, respectively, and α of the two-item PDC factor was 0.70 & 0.60, respectively. The DTSQ scale scores positively correlated with time in range and inversely correlated with HbA1c. Scale scores of DTSQ-T/-P showed significantly positive relations to the KIDSCREEN-10 Index and a negative association with the Problem Areas in Diabetes (PAID). The TS of the parents was correlated with depressive symptoms measured in the Patient Health Questionnaire-9.ConclusionsThe DTSQ-T/-P produced psychometrically sound scores in measuring diabetes treatment satisfaction in German teens with type 1 diabetes and their parents. German DTSQ versions for teens and parents are recommended in research and clinical practice.