title: Urban-rural disparity of overweight/obesity distribution and its potential trend with breast cancer among Chinese women.
abstract: OBJECTIVE
  To evaluate the urban-rural disparity of overweight/obesity and explore its potential trend with breast cancer among Chinese women.
  
  
  RESULTS
  The prevalence of overweight/obesity for Chinese rural women (35.2%, 29.2% for overweight and 6.0% for obesity) was significantly higher than that for Chinese urban women (33.4%, 27.7% for overweight and 5.7% for obesity) (P < 0.001). For either rural or urban women, the prevalence of overweight/obesity was highest in north region, followed by east region for rural women and north-east region for urban women. For rural women, higher prevalence of overweight/obesity was significantly positively associated with elder age, Han nationality, low level of education, no occupation, high family income, less number of family residents, insurance, and elder age at marriage. Similar positive associations were also found for urban women, except negative associations for high family income, less number of family residents, and elder age at marriage. A non-significant positive trend between overweight/obesity and breast cancer was found for rural women [odds ratio (OR): 1.06; 95% confidence interval (CI): 0.87-1.29], but a significant positive trend for urban women (OR: 1.55; 95% CI: 1.19-2.02).
  
  
  METHODS
  A total of 1 210 762 participants were recruited from the Chinese National Breast Cancer Screening Program. Overweight and obesity were defined as body mass index (BMI) ranged 24.0-27.9 kg/m2 and BMI ≥ 28.0kg/m2, respectively.
  
  
  CONCLUSIONS
  There was an obvious urban-rural disparity of overweight/obesity distribution among Chinese women, which could also lead to an obvious disparity of breast cancer distribution.
authors.affiliation: Department of Health Service Management, School of Public Health, Tianjin Medical University, Tianjin, China.|Health Management Center, Tianjin Medical University General Hospital, Tianjin, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Gao
authors.affiliation: Department of Epidemiology and Biostatistics, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.
authors.forename: Yubei
authors.initials: Y
authors.lastname: Huang
authors.affiliation: Department of Epidemiology and Biostatistics, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.
authors.forename: Fengju
authors.initials: F
authors.lastname: Song
authors.affiliation: Department of Epidemiology and Biostatistics, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.
authors.forename: Hongji
authors.initials: H
authors.lastname: Dai
authors.affiliation: Department of Epidemiology and Biostatistics, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.
authors.forename: Peishan
authors.initials: P
authors.lastname: Wang
authors.affiliation: Department of Epidemiology and Biostatistics, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.
authors.forename: Haixin
authors.initials: H
authors.lastname: Li
authors.affiliation: Department of Epidemiology and Biostatistics, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Zheng
authors.affiliation: Department of Epidemiology and Biostatistics, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.
authors.forename: Henglei
authors.initials: H
authors.lastname: Dong
authors.affiliation: Department of Epidemiology, Fairbanks School of Public Health, Simon Cancer Center, Indiana University, Indianapolis, Indiana, USA.
authors.forename: Jiali
authors.initials: J
authors.lastname: Han
authors.affiliation: Department of Health Service Management, School of Public Health, Tianjin Medical University, Tianjin, China.
authors.forename: Yaogang
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Epidemiology and Biostatistics, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.
authors.forename: Kexin
authors.initials: K
authors.lastname: Chen
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D044466:Asian People; D015992:Body Mass Index; D001943:Breast Neoplasms / Q000150:complications* / Q000453:epidemiology*; D002681:China; D005260:Female; D005843:Geography; D054624:Health Status Disparities; D006801:Humans; D008875:Middle Aged; D009765:Obesity / Q000150:complications* / Q000453:epidemiology*; D016017:Odds Ratio; D050177:Overweight / Q000150:complications / Q000453:epidemiology; D015995:Prevalence; D012111:Residence Characteristics; D012424:Rural Population; D012923:Social Class; D014505:Urban Population
keywords: breast cancer; disparity; obesity; overweight