Diabetic morbidity comparison and its influencing factors between populations with impaired glucose tolerance and normal blood glucose tolerance in two communities of Liuzhou city Guangxi Zhuang Autonomous Region

Jintao ZOU; Shihong HU; Limin LING; Liangxi CHEN; Liuning WANG; Juan DU; Peiling YU

ABSTRACT

BACKGROUND:

Diabetic morbidity can predict its progress tendency. National diabetic morbidity has been increased compared with previous level at present.

OBJECTIVE:

To compare the diabetic morbidity between populations with impaired glucose tolerance or normal blood glucose tolerance to analyze its correlative influencing factors.

DESIGN:

A cluster sampling survey in two communities of Liuzhou City Guangxi Zhuang Autonomous Region based on adults.

SETTING:

Department of endocrinology in a university hospital.

PARTICIPANTS:

Diabetic morbidity was investigated in 4 relative big unit communities of Liuzhou City between July and August 1994. The resident population of the communities was 11 886, which were all adults between 20 and 75 years old and lived in Liuzhou City for more than 5 years. Populations with either impaired glucose tolerance or normal blood glucose tolerance in 2 of the 4 unit communities were followed up in October 1999. Totally 9 230 individuals should be checked and 6 020 subjects were actually checked with the response rate of 65.22% (quite a few cases lost followed up due to unemployment and retirement, etc. ) . Inclusion criteria Finally 5 539 subjects with complete data of two surveys entered into statistics. There were 5 237 normal individuals and 266 individuals with impaired glucose tolerance. And there were 3 177 males including 110 individuals with impaired glucose tolerance with an average age of(40 ± 12) years old, and 2 362 females including 156 individuals with impaired glucose tolerance with an average age of(41 ± 10) years old. Exclusion criterion secondary diabetes.

METHODS:

Totally 5 539 subjects(including individuals with normal blood glucose or impaired glucose tolerance) who confirmed without diabetes in 1994 survey for diabetic morbidity in 2 unit communities of Liuzhou City Gugangxi Zhuang Autonomous Region received recheck in 1999 including blood glucose, body mass index(BMI), blood pressure and blood fat to analyze the impacts of each factor on diabetic morbidity.bidity among correlative risk factors.

RESULTS:

Totally 5 539 individuals were included into statistics. A totally of 46 of 5 237 normal individuals developed diabetes with the annual percent of conversion of 0.19%, while 50 of 226 individuals with impaired glucose tolerance developed diabetes with the annual percent of conversion of 3.84%, which had 20.9 times of correlative risk significantly higher than normal individuals(x2 = 1 063.1, P < 0. 000 1).

CONCLUSION:

The risk of diabetes is higher in individuals with impaired glucose tolerance than normal individuals. Age, BMI, hypertension, fasting blood glucose, blood glucose, and 1 hour blood glucose in Glucose tolerance test are risk factors of diabetic morbidity.