Inter-rater Reliability of the Anxiety Disorders Interview Schedule for DSM-IV in High-Functioning Youth with Autism Spectrum Disorder.

The present study examined inter-rater agreement on the Anxiety Disorder Interview Schedule DSM-IV Child and Parent Interview (ADIS-IV-C/P) in high-functioning youth with autism spectrum disorder and if age and ASD diagnosis moderated agreement. Diagnoses established for 70 7 to 16-year-old youth with ASD during a live administration of the ADIS-IV-C/P were compared to diagnoses identified by a second rater after listening to audiotaped recordings of the interviews. Clinician-to-clinician agreement on individual parent and child reports was excellent (k=1.00). Inter-rater agreement on principal diagnoses (k=0.91), individual anxiety diagnoses (k=0.85-0.97), and other comorbid diagnoses (i.e., major depressive disorder, dysthymia, oppositional defiant disorder) (k=0.89-1.00) were excellent; agreement did not differ as a function of ASD diagnosis or age. Results suggest good to excellent inter-rater agreement for disorders assessed by the ADIS-IV-C/P.