Type 2 diabetes and impaired glucose tolerance in North-China-based rural community adults.
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.
Wei
W
W
Department of Epidemiology, School of Public Health, Harbin Medical University, No.157 Street Baojian, Harbin, 150081, China.
Liu
S-Y
SY
Zeng
F-F
FF
Yao
S-P
SP
Zhang
H-T
HT
Wan
G
G
Zhong
M
M
Yang
Z
Z
Wang
B-Y
BY
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