title: [The relationship between socioeconomic status and overweight and obesity among elementary school children in China].
abstract: OBJECTIVE
  To analyze the relationship between socioeconomic status (SES) and overweight and obesity among elementary school children.
  
  
  METHODS
  This cross-sectional study was conducted from September to November, 2010. A stratified random cluster sampling was used from sampling frame of eight provinces by the geographical and economic development distributions in mainland China. A total of 19 934 students aged 7-12 years old participated in this study. All subjects were evaluated the status of overweight and obesity. Green's scoring SES was used to evaluate the SES of the participants. Multivariate logistic regression analysis was performed to examine the relationship between SES and overweight and obesity among children.
  
  
  RESULTS
  According to the scores of Green's SES, the participants' SES were divided into three levels, the prevalence of overweight were 7.4% (538/7295), 9.3% (560/6013) and 12.6% (832/6626), and the prevalence of obesity were 4.4% (321/7295) , 6.4% (387/6013) and 10.2% (677/6626) from low to high SES level, respectively (χ(2) value were 133.82, 180.27, respectively, P < 0.01). After adjusted by age, urban and rural and economic regions, compared with the participants with low SES, the OR (95%CI) of having overweight and obesity among participants with high SES were 1.83(1.61-2.08) for boys and 1.67(1.42-2.00) for girls; the OR (95%CI) with middle SES were 1.30(1.15-1.48) for boys and 1.23(1.04-1.46) for girls.
  
  
  CONCLUSIONS
  The prevalence of overweight and obesity rises with the family's SES levels. There was a positive correlation between SES and overweight and obesity among school-aged children.
authors.affiliation: Division of Non-Communicable Disease Control and Community Health, Chinese Center for Disease Control and Prevention, Beijing 102206, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhai
authors.forename: Xiadaitiguli
authors.initials: X
authors.lastname: Sulayiman
authors.forename: Wei-rong
authors.initials: WR
authors.lastname: Li
authors.forename: Chong
authors.initials: C
authors.lastname: Shen
authors.forename: Wen-hua
authors.initials: WH
authors.lastname: Zhao
authors.affiliation: Email: sxmcdc@163.com.
authors.forename: Xiao-ming
authors.initials: XM
authors.lastname: Shi
mesh_terms: D002648:Child; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D009765:Obesity / Q000191:economics / Q000453:epidemiology*; D050177:Overweight / Q000191:economics / Q000453:epidemiology*; D015995:Prevalence; D012923:Social Class