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Cited by 145Autism Spectrum Disorder ResearchGenetics and Neurodevelopmental DisordersFamily and Disability Support Research

Reevaluating the incidence of Pervasive Developmental Disorders: Impact of elevated rates of detection through implementation of an integrated system of screening in Toyota, Japan

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Kawamura, Yuichi, Takahashi, Osamu, Ishii, Takashi·2008·Psychiatry and Clinical Neurosciences
DOI 10.1111/j.1440-1819.2008.01748.x
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Abstract

Aim: Although recent epidemiological studies on the pervasive development disorders (PDD) appear to be reporting higher rates of incidence than previously believed, great variation in the reported figures suggests a need for review of the methodology involved. As such, a survey on the incidence of PDD was conducted and compared with data from a previous survey to examine the effects of screening and diagnostic methodology on incidence. Methods: The incidence of pervasive developmental disorders was surveyed in all children (12 589) born between January 1994 and December 1996 in Toyota, Japan. Results: Incidence was 1.81% and the ratio of boys to girls was 2.80. Definitive diagnoses were made between 13 months and 7 years 2 months, the average age at diagnosis being 3 years 4 months. Among the cases of PDD, children with normal or borderline intelligence amounted to 66.4%, mild mental retardation (MR) 17.5%, moderate MR 10.3% and severe MR 5.8%. Conclusion: An approximately 11‐fold increase was noted in prevalence of PDD compared to a previous survey two decades ago, and two main factors were believed to account for this apparent sharp increase. First, inclusion of high‐functioning subjects detected during infancy, and second, higher rates of diagnosis resulting from an integrated process of screening.

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  • The PDD prevalence estimate ranged from 6.3 in Iran to 181.0 in Japan, and on average was >30 in Europe.

    “The PDD prevalence estimate ranged from 6.3 in Iran [43] to 181.0 in Japan [45], and, on average, was >30 in Europe.”

    From Vitamin D and Autism Spectrum Disorder: A Literature Review (2016) · cites this paper as [45]

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Research works printed but not linked: 3

  1. 4 Ishii T, Takahashi O. The epidemiology of autistic children in Toyota, Japan: Prevalence. Jpn. J. Child Adolesc. Psychiatry 1983; 24 : 311-321.
  2. 7 Kadesjo B, Gillberg C, Hangberg B. Brief Report. Autism and Asperger syndrome in seven-year-old children. J. Autism Dev. Disord. 1999; 29 : 327-332.
  3. 14401819, 2008, 2, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/j.1440-1819.2008.01748.x, Wiley Online Library on [02/01/2024]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License

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Authors
Kawamura, Y., Takahashi, O., & Ishii, T.
Affiliations
Nagoya University Hospital (JP)
Corresponding author
Kawamura, Yuichi
ORCID
Venue
Psychiatry and Clinical Neurosciences
Publisher
Wiley
Published
2008-04
Volume
62
Issue
2
Pages
152-159
ISSN
  • 1323-1316 (ISSN-L)
  • 1440-1819
DOI
10.1111/j.1440-1819.2008.01748.x
OpenAlex
W2095580341
Cited by
145
References
15
Citations by year
2026: 2 · 2025: 3 · 2024: 1 · 2023: 3 · 2022: 6 · 2021: 9 · 2020: 12 · 2019: 9 · 2018: 15 · 2017: 12 · 2016: 10 · 2015: 5 · 2014: 13 · 2013: 12 · 2012: 15
FWCI
3.10
Type
journal article
Language
en
Open access
Licence
onlinelibrary.wiley.com/termsAndConditions#vor (vor, 13 d)
Locations
  • Psychiatry and Clinical Neurosciences (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Social Sciences › Psychology › Clinical Psychology › Family and Disability Support Research
Keywords
pervasive developmental disorders, autism spectrum disorder, incidence, screening, diagnostic methods, sex ratio, intellectual disability, high-functioning autism, early diagnosis, prevalence trends
MeSH terms
Autistic Disorder, Child, Child Development Disorders, Pervasive, Child, Preschool, Cross-Sectional Studies, Female, Health Surveys, Humans, Infant, Intelligence, Japan, Male, Mass Screening, Urban Population, Incidence

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