Diagnoses for autism based on the Autism Diagnostic Interview-Revised (ADI-R) and the Childhood Autism Rating Scale (CARS) were examined for 83 individuals with suspected autism. Agreement between systems reached 85.7%. Participants receiving diagnosis of autism based on only one system were significantly younger in age than individuals receiving diagnoses according to both systems. Individuals who did not receive diagnosis of autism on the ADI-R had lower chronological and mental ages and lower CARS scores compared to individuals who received diagnosis of autism based on the ADI-R. Eighteen females and 18 males were matched to examine possible gender differences. No significant findings were revealed, suggesting that the symptoms of autism according to the ADI-R and CARS do not differ between males and females when matched for chronological and mental ages.
Bibliographical noteFunding Information:
This research was supported by a grant from the Milton Rosenbaum Endowment Fund for Research in Psychiatric Sciences (1994-1996), and by small grants from the Martin and Vivian Levin Center for the Normal and Psychopathological Development of the Child and Adolescent, the Shaine Center for Research in Social Sciences, and the Sturman Center for Human Development. We are grateful to the individuals who participated in the study, to Charles Greenbaum, Michal Or, and to the reviewers for their helpful comments.
- Autism Diagnostic Interview-Revised
- Childhood Autism Rating Scale