Epidemiological study of autism spectrum disorder in China

Area of Science:

• Pediatrics
• Epidemiology
• Neurodevelopmental Disorders

Background:

• Autism spectrum disorder (ASD) diagnosis and management require robust epidemiologic data for effective public health strategies.
• Limited epidemiologic studies on ASD exist for Chinese populations, necessitating research to understand prevalence and incidence patterns.
• Establishing a comprehensive registry is crucial for accurate ASD data collection and analysis.

Purpose of the Study:

• To investigate the epidemiologic patterns of autism spectrum disorder (ASD) in Chinese children.
• To determine the incidence and prevalence rates of ASD in Hong Kong children from 1986 to 2005.
• To analyze the male to female ratio in diagnosed cases of ASD.

Main Methods:

• Established a comprehensive ASD registry in Hong Kong since 1986, integrating data from a single child assessment center and public hospital inpatient records.
• Utilized the Clinical Data Analysis and Reporting System to retrieve and ensure completeness of clinical data for ASD diagnoses.
• Calculated incidence and prevalence using population statistics for children under 15 and under 5 years old in Hong Kong between 1986 and 2005.

Main Results:

• Identified 645 children aged 0-4 years with ASD diagnoses between 1986 and 2005.
• Estimated incidence of ASD at 5.49 per 10,000 children.
• Reported a prevalence of 16.1 per 10,000 children under 15 and a male to female ratio of 6.58:1.

Conclusions:

• This study provides the first epidemiologic data on ASD in Chinese children, establishing baseline incidence and prevalence rates.
• The incidence rate of ASD in Hong Kong children is comparable to findings in Australia and North America, but lower than in European populations.
• Findings underscore the importance of ongoing surveillance and research into ASD epidemiology within diverse ethnic groups.