title: Prevalence of Overweight and Obesity among Children and Adolescents in Shandong, China: Urban-Rural Disparity.
abstract: The pattern of urban-rural disparity in childhood obesity varies across countries. The present study examined the change trend of urban-rural disparity in childhood overweight and obesity from 1985 to 2014 in Shandong, China.
  
  
  
  Data for this study were obtained from four cross-sectional surveys of school children carried out in 1985, 1995, 2005 and 2014 in Shandong Province, China. In this study, 39 943 students aged 7-18 years were included (14 458 in 1985, 7198 in 1995, 8568 in 2005 and 9719 in 2014). Height and weight of all subjects were measured; body mass index (BMI) was calculated from their height and weight. The BMI cutoff points recommended by the International Obesity Task Force were used to define overweight and obesity.
  
  
  
  The prevalence of overweight and obesity was increasing continuously both in urban and rural areas over the past 29 years (1985-2014). The prevalence of combined overweight and obesity was significantly higher in urban than in rural children and adolescents in 1985, 1995 and 2005 (p < 0.01). However, a rapid increase in the prevalence of combined overweight and obesity was observed in rural areas after 2005; as a result, the urban-rural disparity was getting narrower, and no significant urban-rural disparity was observed in 2014 (p > 0.05).
  
  
  
  The change trend of urban-rural disparity should be concerned in the future; policies and interventions focused on childhood overweight and obesity should pay attention to rural areas.
authors.affiliation: Shandong Center for Disease Control and Prevention, Shandong University Institute of Preventive Medicine, Shandong, China sdcdczyx@163.com.
authors.forename: Ying-Xiu
authors.initials: YX
authors.lastname: Zhang
authors.affiliation: Yantai Center for Disease Control and Prevention, Shandong, China.
authors.forename: Zhao-Xia
authors.initials: ZX
authors.lastname: Wang
authors.affiliation: Shandong Center for Disease Control and Prevention, Shandong University Institute of Preventive Medicine, Shandong, China.
authors.forename: Jin-Shan
authors.initials: JS
authors.lastname: Zhao
authors.affiliation: Shandong Center for Disease Control and Prevention, Shandong University Institute of Preventive Medicine, Shandong, China.
authors.forename: Zun-Hua
authors.initials: ZH
authors.lastname: Chu
mesh_terms: D000293:Adolescent; D015992:Body Mass Index; D002648:Child; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D005260:Female; D054624:Health Status Disparities; D006801:Humans; D008297:Male; D056128:Obesity, Abdominal / Q000453:epidemiology*; D050177:Overweight / Q000453:epidemiology*; D063766:Pediatric Obesity / Q000453:epidemiology*; D015995:Prevalence; D012111:Residence Characteristics; D012424:Rural Population; D014505:Urban Population
keywords: child and adolescent.; obesity; overweight; prevalence; urban–rural disparity