[A cross-sectional study on prevalance and risk factors of disabilities in aged 0-6 years children in Beijing, China].
OBJECTIVE
To explore the epidemiological status of disabilities on vision impairment (VI), hearing loss (HL), mental retardation (MR), autism spectrum disorder (ASD) and motor disorder (MD) in aged 0-6 years old children in Beijing.


METHODS
A total of 28 738 children under 7 years old were recruited from permanent residents of Beijing City by 2-phase cluster sampling. The screening procedure was 2-phase, and the diagnosis criteria were developed by the experts group.


RESULTS
The overall disability rate was 11.45 per thousand (95 % CI:10.22-12.68). The false negative rates in HL and ASD were 0.14 per thousand, 0.80 per thousand, respectively, with a adjusted overall rate of 12.19per thousand. The prevalence rates of different kind disabilities from high to low were MR 9.31per thousand, MD 2.12per thousand, ASD 1.53per thousand (0.73per thousand before adjusted), HL 1.04per thousand (0.91per thousand before adjusted) VI 0.73per thousand. The results of logistic regression analysis showed that the possible non-biological risk factors for those disabilities were being male, living in city area, advancing age, mother with low education, mother engaged in labor work, and family with low income. It was primarily (49.62%) those prenatal factors other them the known suspected factors that causing disabilities.


CONCLUSIONS
Compared with data from a countrywide study in 1987, the overall disability rate had a mild decrease (16.36%) with the most (56.85%) appeared in HL. It is indispensable to establish a disabilities surveillance program for the early recognition and intervention of children with disabilities. It is also crucial to clarify a disability definition for children combined with their characteristics of growth and development. We strongly recommended in developing a new definition on children' disabilities and establishing new criteria according to the contents of developmental disabilities of Center for Disease Control, USA.
Wang
Xiao-hua
XH
Child Health Deparrtment, Beijing Maternal and Child Health Hospital, Beijing 100006, China.
Qu
Cheng-yi
CY
Shi
Ji-liang
JL
Liu
Gang
G
Zhang
Zhi-xiang
ZX
Yang
Xiao-ling
XL
Sun
Xi-bin
XB
Sun
Lin
L
Zheng
Yuan-yuan
YY
Liu
Xi-pu
XP
Shao
Cui-xia
CX
Teng
Hong-hong
HH
Wang
Yan
Y
D017677:Age Distribution; D002659:Child Development Disorders, Pervasive / Q000453:epidemiology; D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D019988:Children with Disabilities / Q000706:statistics & numerical data*; D004522:Educational Status; D005260:Female; D006306:Health Surveys; D034381:Hearing Loss / Q000453:epidemiology; D006801:Humans; D007182:Income / Q000706:statistics & numerical data; D007223:Infant; D007231:Infant, Newborn; D008607:Intellectual Disability / Q000453:epidemiology; D008297:Male; D019957:Motor Skills Disorders / Q000453:epidemiology; D009790:Occupations / Q000706:statistics & numerical data; D010290:Parents; D012307:Risk Factors; D017678:Sex Distribution; D014786:Vision Disorders / Q000453:epidemiology