[Interrater reliability for diagnosis in adults of attention deficit hyperactivity disorder and oppositional defiant...

The diagnosis of attention deficit hyperactivity disorder (ADHD) and oppositional defiant disorder (ODD) in adults lacks adequate assessment instruments. The aim of this investigation is to evaluate the interrater reliability of the sections of K-SADS-E adapted for the diagnosis of these disorders among adults. The adaptations were limited to asking questions directly to the patient, investigation of a later onset of symptoms, and asking for adult specific symptoms. Six trained raters scored 16 recorded interviews. Kappa coefficients were 1.00 for ADHD diagnosis in the past, 0.91 for subtype in the past, 1.00 for ADHD diagnosis in the present, 0.95 for subtype in the present, 1.00 and 0.89 for ODD diagnosis in the past and present, respectively (all with p < 0.001). These results reveal excellent agreement for the ADHD and ODD diagnosis in adults using the adapted form of the Portuguese version of K-SADS-E.