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The Japanese Version of the Diagnostic Interview for Social and Communication Disorders 11: A Preliminary Study of Japanese Version

Thursday, 2 May 2013: 09:00-13:00
Banquet Hall (Kursaal Centre)
Y. Uno1,2, T. Uchiyama1,3, T. Yoshikawa4, Y. Nakayama5, N. Ozaki6, J. Gould7 and L. Wing7, (1)Yokohama Psycho-Developmental Clinic, Yokohama, Japan, (2)Psychiatry and Psychiatry for Parents and Children, Nagoya University Hospital, Nagoya, Japan, (3)Faculty of Human Development, Fukushima University, Fukushima, Japan, (4)Child and Adolescent Psychiatry, Central Hospital, Aichi Human Service Center, Kasugai, Japan, (5)Child Adolescent Psychiatry, Tokyo Metropolitan Children's Medical Center, Fucyu, Japan, (6)Psychiatry, Child and adolescent psychiatry, Nagoya University Graduate School of Medicen, Nagoya, Japan, (7)Lorna Wing Centre, National Autistic Society, Bromley, United Kingdom
Background: The Diagnostic Interview for Social and Communication Disorders (DISCO) is a schedule for the diagnosis of autistic spectrum and related disorders and assessment of individual needs. The DISCO, which was developed by Wing and Gould, is widely used in Europe and Japan as a clinical and research instrument. Although it has been translated into Japanese, Swedish and Dutch, its reliability and validity have been studied only in U.K and Sweden.

Objectives: The purpose of this study is to examine the inter-rater reliability and the criterion-based validity of the Japanese version of the DISCO (DISCO-J). This is the first report on the DISCO-J.

Methods: The authorized Japanese translation of the eleventh version of the DISCO was used in interviews with parents of 22 children. 11 children had the diagnosis of Autism spectrum disorder (ASD)  ( 89±22mths, M:F 8:3, mean IQ±SD 91.5±28.8) and 11 children were a sample with typical development (Age 75±23mths, M:F 3:8, IQ 102.8±14.1).  One DISCO-licensed child psychiatrist carried out the interviews, rated all items of DISCO-J and made clinical diagnoses based on the classifications of pervasive developmental disorders in the Diagnostic and Statistical Manual 4th edition Text Revision (DSM-IV-TR). Another DISCO-licensed child psychiatrist observed the interviews, rated all items of DISCO-J and then made independent diagnoses based on the DSM-IV-TR.  The inter-rater reliability of the assessments by the two psychiatrists using the DISCO-J and the criterion-based validity of the diagnoses using the DISCO-J and the DSM-IV-TR were examined.

Results: There was a significant difference between the results for sex ratio(χ2=4.5, p=0.03)but no difference was observed for age and IQ between the ASD group and Non-ASD group.  For the inter-rater reliability, Cohen’s kappa or intraclass correlation coefficient r was over 0.78 for all three sections of infancy, age of recognition / development and untypical behavior.  For the diagnosis part,κor r was 0.88. For criterion based validity the concordance rate of DSM-DISCO diagnosis was 95% and κ was 0.91.

Conclusions: Based on this study, the DISCO-J appears to have good inter-rater reliability and criterion-based validity.  Since these preliminary findings were for a small number of 22 subjects, it will be necessary to widen the study over a larger number of patients.

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