title: Type 2 diabetes and impaired glucose tolerance in North-China-based rural community adults.
abstract: OBJECTIVE
  To estimate the prevalence of type 2 diabetes and impaired glucose tolerance (IGT), and to identify potential risk factors among adults in rural areas in North China.
  
  
  METHODS
  Multistage random cluster sampling in a cross-sectional study.
  
  
  METHODS
  Data were collected in 2005 from 1058 adults aged >20 years. Body mass index (BMI), waist and hip circumferences, 2-hour postprandial glucose (2-hPG) and other data were collected.
  
  
  RESULTS
  The prevalence of diabetes and IGT was higher for both men and women in the study group compared with the national averages (diabetes: 7.17% and 7.01%, respectively; IGT: 7.55% and 7.95%, respectively). Men aged ≥60 years and women aged 50-59 years had the highest prevalence of diabetes compared with other age groups (9.62% and 9.21% respectively). Both men and women aged ≥60 years had the highest prevalence of IGT. A sudden increase in 2-hPG level was seen in women aged ≥40 years. Those with BMI ≥28 kg/m(2) were at two-fold higher risk than normal. The risk for glucose tolerance abnormalities was almost 1.55-fold higher in subjects with waist/height ratio (WHtR) ≥0.50. The odds ratio for diabetes was 0.32 (95% confidence interval 0.10-0.98) in subjects with an annual family income ≥30,000 yuan compared with those with lower incomes.
  
  
  CONCLUSIONS
  These results indicate that rural populations in North China have a higher prevalence of type 2 diabetes and IGT compared with national averages. Women aged ≥40 years warrant more attention to avoid glucose tolerance abnormalities. BMI and WHtR are predictive of the prevalence of glucose tolerance abnormalities. High annual family income appears to be a protective factor for type 2 diabetes.
authors.affiliation: Department of Epidemiology, School of Public Health, Harbin Medical University, No.157 Street Baojian, Harbin, 150081, China.
authors.forename: W
authors.initials: W
authors.lastname: Wei
authors.forename: S-Y
authors.initials: SY
authors.lastname: Liu
authors.forename: F-F
authors.initials: FF
authors.lastname: Zeng
authors.forename: S-P
authors.initials: SP
authors.lastname: Yao
authors.forename: H-T
authors.initials: HT
authors.lastname: Zhang
authors.forename: G
authors.initials: G
authors.lastname: Wan
authors.forename: M
authors.initials: M
authors.lastname: Zhong
authors.forename: Z
authors.initials: Z
authors.lastname: Yang
authors.forename: B-Y
authors.initials: BY
authors.lastname: Wang
mesh_terms: D000328:Adult; D000367:Age Factors; D015992:Body Mass Index; D001837:Body Weights and Measures; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D003924:Diabetes Mellitus, Type 2 / Q000453:epidemiology*; D005260:Female; D018149:Glucose Intolerance / Q000453:epidemiology*; D005951:Glucose Tolerance Test; D015438:Health Behavior; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012307:Risk Factors; D012424:Rural Population / Q000706:statistics & numerical data*; D012737:Sex Factors; D012959:Socioeconomic Factors