Gender and geographic differences in the prevalence of intellectual disability in children: Analysis of data from the national disability registry of Taiwan

Der Chung Lai, Yen Cheng Tseng, Yuh Ming Hou, How-Ran Guo

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Intellectual disability (ID) is not uncommon in children, but data at the national level are limited, especially those on geographic differences. On the basis of the Disabled Welfare Law, Taiwan began to certify disabled residents and provide various services in 1980. All the cases are registered, and the registry provides a rare opportunity for studying ID at the national level. Using the data from 2004 to 2010, we calculated the prevalence of ID in children by age, gender, and geographic area and assessed the changes over time. We limited analyses to children at least 3 years of age, because certification before 3 years old is discouraged by the government. We found that from 2004 to 2010, the registered cases between 3 and 17 years old ranged from 20,531 to 23,547, and the prevalence of ID increased constantly from 4.40/1000 to 5.79/1000 (p<0.01), which generally increased every year in all age groups (p<0.01). In each year there were more boy cases than girl cases, and the boy-to-girl ratio generally decreased with age (p<0.01 for chi-square test for trend in all years). The prevalence rate ratio ranged from 1.33 to 1.37 (p<0.01 in all years), and the changes in the rate ratio were small over the years. We observed a higher prevalence in the rural areas over the years, and the prevalence rate ratio ranged from 1.34 to 1.43 (p<0.01 in all years), with an increasing trend over time (p<0.01).

Original languageEnglish
Pages (from-to)2301-2307
Number of pages7
JournalResearch in Developmental Disabilities
Volume33
Issue number6
DOIs
Publication statusPublished - 2012 Nov 1

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Taiwan
Intellectual Disability
Registries
Certification
Chi-Square Distribution
Age Groups

All Science Journal Classification (ASJC) codes

  • Developmental and Educational Psychology
  • Clinical Psychology

Cite this

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title = "Gender and geographic differences in the prevalence of intellectual disability in children: Analysis of data from the national disability registry of Taiwan",
abstract = "Intellectual disability (ID) is not uncommon in children, but data at the national level are limited, especially those on geographic differences. On the basis of the Disabled Welfare Law, Taiwan began to certify disabled residents and provide various services in 1980. All the cases are registered, and the registry provides a rare opportunity for studying ID at the national level. Using the data from 2004 to 2010, we calculated the prevalence of ID in children by age, gender, and geographic area and assessed the changes over time. We limited analyses to children at least 3 years of age, because certification before 3 years old is discouraged by the government. We found that from 2004 to 2010, the registered cases between 3 and 17 years old ranged from 20,531 to 23,547, and the prevalence of ID increased constantly from 4.40/1000 to 5.79/1000 (p<0.01), which generally increased every year in all age groups (p<0.01). In each year there were more boy cases than girl cases, and the boy-to-girl ratio generally decreased with age (p<0.01 for chi-square test for trend in all years). The prevalence rate ratio ranged from 1.33 to 1.37 (p<0.01 in all years), and the changes in the rate ratio were small over the years. We observed a higher prevalence in the rural areas over the years, and the prevalence rate ratio ranged from 1.34 to 1.43 (p<0.01 in all years), with an increasing trend over time (p<0.01).",
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Gender and geographic differences in the prevalence of intellectual disability in children : Analysis of data from the national disability registry of Taiwan. / Lai, Der Chung; Tseng, Yen Cheng; Hou, Yuh Ming; Guo, How-Ran.

In: Research in Developmental Disabilities, Vol. 33, No. 6, 01.11.2012, p. 2301-2307.

Research output: Contribution to journalArticle

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AU - Hou, Yuh Ming

AU - Guo, How-Ran

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