Changes in Prevalence and Socioeconomic Factors of Psychiatric Disability among Children in China from 1987-2006: A Population Based Survey.

The prevalence and risk factors associated with psychiatric disability among Chinese children under 14 years of age has long been of interest. Data used in the study included two nationally representative population-based surveys from the first and second China National Sample Surveys on Disability, conducted in 1987 and 2006. Both surveys used multistage, stratified random cluster sampling, with probability proportion to size, to derive nationally representative samples. Age-standardized point prevalence of mental disability was estimated through direct standardization using the 2000 census-derived Chinese population as the standard. Associations between psychiatric disability in children and possible risk factors were examined by logistic regression. Age-standardized point prevalence of psychiatric disability in children increased sharply from 0.18% to 1.11% in the 20 years between surveys. In the logistic regression analysis, the children's age and household size presented inverse associations with psychiatric disability in both surveys, although these associations were not all significant in 1987. Residential area, minority group status and gender of children were consistently associated with psychiatric disability in both surveys. To face the challenge of rising prevalence rates of psychiatric disability among children in China, the government should adopt more vigorous strategies to prevent it, especially for minority ethnicity children and those living in rural areas.