We provide a systematic review of epidemiological surveys of autistic disorder and pervasive
developmental disorders ( PDDs ) worldwide. A secondary aim was to consider the …

This paper was commissioned by the committee on the Effectiveness of Early Education in
Autism of the National Research Council (NRC). It provides a review of epidemiological …

This article reviews the results of 43 studies published since 1966 that provided estimates
for the prevalence of pervasive developmental disorders (PDDs), including autistic disorder, …

Sensori-motor development and performance of daily living skills (DLS) remain little
explored in children with autism spectrum disorders (ASD). The objective of this study was to …

Importance Symptom severity and adaptive functioning are fundamental domains of the autism
spectrum disorder (ASD) phenotype. To date, the longitudinal association between these …

Background. There is some uncertainty about the rate and correlates of autism.Method.
Twenty-three epidemiological surveys of autism published in the English language between …

A number of studies have confirmed that genetic factors play an important role in autism
spectrum disorder (ASD). More recently de novo mutations in the SHANK3 gene, a synaptic …

Prevalence estimates of autism are essential for informing public policy, raising awareness,
and developing research priorities. Using a systematic review, we synthesized estimates of …

Is the incidence of autistic disorder and other pervasive developmental disorders (PDDs)
increasing? Recent epidemiological surveys of autistic disorder and other PDDs have …

<p id="p001">Although autosomal forms of nonsyndromic mental retardation account for the
majority of cases of mental retardation, the genes that are involved remain largely unknown. …