The Early Diagnosis of Preschool Children with Autism Spectrum Disorder in Norway: a Study of Diagnostic Age and Its Associated Factors

The early identification of autism spectrum disorder is important to ensure access to early intervention. Much research has focused on the identification of early behavioral symptoms and screening. This study examines referral for diagnostic assessment, diagnostic age, and factors associated with diagnostic age for children with autism spectrum disorder. The results of this study indicate that children are referred and diagnosed later than they should be. Previous research has identified a valid time for the identification and diagnosis of this disorder as well as the diagnostic procedures and types of clinics that are associated with the appropriate diagnostic age.