Brief Report

Journal of Autism and Developmental Disorders

, Volume 41, Issue 12, pp 1738-1742

Brief Report: Prevalence of Pervasive Developmental Disorder in Brazil: A Pilot Study

  • Cristiane S. PaulaAffiliated withDevelopmental Disorder Post Graduation Program, Mackenzie Presbyterian UniversityDepartment of Psychiatry, Federal University of São Paulo Email author 
  • , Sabrina H. RibeiroAffiliated withDevelopmental Disorder Post Graduation Program, Mackenzie Presbyterian University
  • , Eric FombonneAffiliated withDepartment of Psychiatry—Montreal Children’s Hospital, McGill University
  • , Marcos T. MercadanteAffiliated withDepartment of Psychiatry, Federal University of São Paulo

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Abstract

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.

Keywords

Prevalence Pervasive developmental disorders Autism Epidemiological studies South America