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1987年四川省采用分层、1.4‰等概率比例及整群抽样方法,进行了智力残疾人抽样调查,共调查145 201人,智力残疾2 342人,现患率为16,13‰。调查表明智力残疾人现患率在不同性别、民族间无显著性差异(P>0,05)。学龄期儿童现患率为其他年龄组的3倍左右,经济文化水平越落后的地区,智力残疾现患率越高,轻度智力残疾者是极重度者的16,4倍,智力残疾原因除不详因素外,遗传性疾病最高,其他依次为脑炎,脑膜炎,营养不良等。
In 1987, Sichuan Province adopted stratification, 1.4 ‰ equal probability proportion and cluster sampling method to conduct a sample survey of persons with mental disability. A total of 145 201 people and 2 342 persons with mental disabilities were investigated, with a prevalence of 16,13 ‰. The survey shows that the prevalence of mental retardation in different genders, no significant difference between ethnic groups (P> 0,05). The prevalence rate of school-age children is about 3 times that of other age groups. In the areas where the economic and cultural level lags behind, the prevalence rate of mental retardation is higher, and the rate of mental retardation is 16,4 times that of those with severe mental retardation. In addition, In addition, the highest genetic disease, followed by encephalitis, meningitis, malnutrition and so on.