Autism phenotype versus registered diagnosis in Swedish children: prevalence trends over 10 years in general population samples.

The article discusses research which examined the annual prevalence of the autism symptom phenotype compared with registered diagnoses for autism spectrum disorder in Swedish children. Topics covered include the increase in prevalence of registered diagnoses of autism spectrum disorder in the patient register, the lack of significance in the effect of time and of birth year and the need to consider differences in age and follow-up time in comparing the samples.