Psychometric properties of the Dutch-Flemish PROMIS® pediatric item banks Anxiety and Depressive Symptoms in a general population

This study aims to validate the Dutch-Flemish PROMIS pediatric item banks v2.0 Anxiety and Depressive Symptoms, short forms 8a, computerized adaptive tests (CATs) in a general Dutch population provide reference data. Participants (N = 2,893, aged 8–18), recruited by two internet survey providers, completed both banks. These were assessed on unidimensionality, local independence, monotonicity, Graded Response Model (GRM) fit, differential functioning (DIF) for gender, age group, region, ethnicity, language. The CATs reliability construct validity compared Revised Child Depression Scale version (RCADS-22) subscales. Reference scores calculated. Both showed sufficient GRM except three Symptoms items that insufficient fit. No DIF was found when using ordinal regression analyses, language; all language IRT PRO, one item. revealed moderate severe levels of anxiety depression, as well high positive correlations with corresponding RCADS-22 subscales slightly lower non-corresponding 8a are useful assess monitor depression population. data presented.