Evaluating depression in Indonesian adolescents with epilepsy: Comprehensive validation and reliability assessment of the neurological disorders depression inventory‐epilepsy for youth Indonesian version (NDDI‐E‐Y[ID])

Abstract Objectives Epilepsy is a common chronic neurological disorder in pediatrics. Depression is an often underdetected comorbidity in childhood epilepsy. This study aimed to adapt the Neurological Disorders Depression Inventory‐Epilepsy for Youth (NDDI‐E‐Y) to the Indonesian language and population, as well as to validate the Indonesian version of NDDI‐E‐Y (NDDI‐E‐Y[ID]). Methods This three‐stage study comprised instrument translation, cultural verification, and content validity testing (first stage), pilot testing (second stage), followed by concurrent validity and reliability testing (third stage) of the NDDI‐E‐Y(ID). Validation was done against the Centre for Epidemiologic Studies Depression Scale – Revised (CESD‐R). Content validity, assessed by six experts, was quantified using the content validity index for items (I‐CVI) and scale (S‐CVI). Participants were adolescents aged 12–17 years diagnosed with any type of epilepsy who completed both instruments. Concurrent validity was evaluated using Spearman's correlation and reliability was measured using Cronbach's alpha. Results The first stage produced a culturally appropriate NDDI‐E‐Y(ID). Thirty healthy adolescents and 10 adolescents with epilepsy participated in the second stage. In the third stage, another group of 30 adolescents with epilepsy took part. We obtained I‐CVI and S‐CVI values averaging 1. The NDDI‐E‐Y(ID) showed a positive and significant correlation with CESD‐R (Spearman's rho = 0.671, p