Journal
JOURNAL OF AUTISM AND DEVELOPMENTAL DISORDERS
Volume 41, Issue 12, Pages 1738-1742Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10803-011-1200-6
Keywords
Prevalence; Pervasive developmental disorders; Autism; Epidemiological studies; South America
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This pilot study presents preliminary results concerning the prevalence of Pervasive Developmental Disorder (PDD) in South America. It was a three-phase study conducted in a typical town in Southeast Brazil. Case definition was based in a combination of standardized instruments and clinical evaluations by experts. The prevalence of PDD was 27.2/10,000 (95% CI: 17.6-36.8) and some hypotheses were raised to explain this low frequency. Clinical findings of PDD cases were consistent with previous data, such as, male preponderance, more children diagnosed with PDD-NOS than with autistic disorder, and half of them born from older mothers. Moreover, the study raised concerns about treatment of cases, because identification of PDD had been late and access to services has been very limited.
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