To determine the best discriminative items for identifying young children with autism spectrum disorders (ASD), we conducted a secondary analysis using longitudinal cohort data that included the Japanese version of the 23-item modified checklist for autism in toddlers (M-CHAT-JV). M-CHAT-JV data at 18 months of age and diagnostic information…

To determine whether the Modified Checklist for Autism in Toddlers (M-CHAT) in conjunction with the routine 18-month health check-up identifies Japanese toddlers with autism spectrum disorder (ASD). Two-stage screening using the M-CHAT was conducted with 1,851 children attending the check-up. Final ASD diagnosis was confirmed at age =3 years.…

Based on an observational study of children (ages 3-7) screened at a child guidance center in Japan, the prevalence rate of infantile autism in each one-year birth cohort (1972-1978) fluctuated in a four-year cycle which was closely correlated with the number of children hospitalized with lower respiratory tract diseases. (JW)

A study of the development of epilepsy in adolescents with autism investigated the brain dysfunctions in 158 patients (ages 15-28) with autism through the examination of paroxysmal electroencephalographic abnormalities. Results indicated that 47.5% of the individuals with autism had such abnormalities in the frontal region. (CR)

A Japanese study measured CSF (cerebrospinal fluid) levels of beta-endorphin in 19 children (ages 4-6) with infantile autism and in 3 children (ages 10-14) with Rett syndrome. In infantile autism, levels did not differ significantly from control participants (n=23). However, levels were significantly higher in those with Rett syndrome. (Author/CR)

A Japanese translation of the Childhood Autism Rating Scale was used with 167 developmentally disabled children under age 16. Total score demonstrated a satisfactory level of taxonomic validity and discriminated infantile autism and other pervasive developmental disorders from mental retardation alone. A satisfactory concurrent validity on the…