title: [Cross-sectional survey of children body fat and influence analysis in Beijing and Guangzhou].
abstract: OBJECTIVE
  Knowing the percent of the body fat in the Chinese young and doing some basic works of making the fat mass criteria of the Chinese children obesity and prevention of the obesity in the young children.
  
  
  METHODS
  2445 children (1257 males and 1188 females) from Beijing and Guangzhou were studied. All of them underwent anthropometrical measurements and bioelectrical impedance analysis (BIA). By applying Chinese children fat mass predict equation to estimate their FFM. The percent of fat mass was calculated by subtracting FFM from weight (Wt).
  
  
  RESULTS
  The body fat percent increase with the age increase both in boys and girls. There is gender different between boys and girls. The boys' BF(%) is higher than in the girls'. The boys and girls' BF(%) in Beijing are higher than boys and girls' BF(%) in Guangzhou. At the same growth degree with the ages increase the BF(%) decrease; while at the same age, with growth increase, BF(%) decrease both in boys and girls.
  
  
  CONCLUSIONS
  The BF(%) is different between the ages, area, and gender and growth degree.
authors.affiliation: Department of Coummunity Medicine and School of Public Health, the University of Hong Kong. sunwenjie2002@hotmail.com
authors.forename: Wenjie
authors.initials: W
authors.lastname: Sun
authors.forename: Jingzhong
authors.initials: J
authors.lastname: Wang
authors.forename: Guansheng
authors.initials: G
authors.lastname: Ma
mesh_terms: D000273:Adipose Tissue / Q000033:anatomy & histology*; D000293:Adolescent; D000367:Age Factors; D000886:Anthropometry; D001823:Body Composition; D015992:Body Mass Index; D002648:Child; D002681:China; D003430:Cross-Sectional Studies; D017097:Electric Impedance; D005260:Female; D006801:Humans; D008297:Male; D012016:Reference Values; D012737:Sex Factors