What causes impaired glucose tolerance to deteriorate or normalize?
Twenty-five middle-aged subjects with impaired glucose tolerance (IGT) were analysed 5 years later, showing normal glucose tolerance in 28% and persistent glucose deterioration in 72%. Body mass index (strongly) and 2-h glucose levels were clinically useful predictors, in the newly detected IGT-subjects, of persistent glucose deterioration (IGT or NIDDM) 5 years later. The frequency of hypertension was 36% in the newly-detected IGT subjects. Five years later this frequency increased to 54% in the persistently hyperglycaemic group, and decreased to none in the normalized group. Predictors of hypertension at the follow-up were baseline blood pressure and parts of the hyperinsulinaemic syndrome, such as serum triglyceride at baseline, BMI and 2-h glucose at the follow-up. Microalbuminuria (greater than 20 mg day-1) was not found at the 5-years follow-up, either if the subjects then had NIDDM, IGT or normal glucose tolerance. ECG abnormalities (ST segment and T wave changes) were two-fold more prevalent in the group with IGT or NIDDM than in the normalized group at the follow-up. Predictors were baseline BMI and incremental BMI. In conclusion, obesity and high 2-h glucose in newly-detected IGT-subjects seemed to predict the persistence of IGT 5 years later. Hypertension, but not microalbuminuria, was frequent when glucose deterioration persisted.
Cederholm
J
J
Department of Internal Medicine, University Hospital, Uppsala, Sweden.
Wibell
L
L
D000419:Albuminuria / Q000209:etiology; D001786:Blood Glucose / Q000032:analysis*; D003924:Diabetes Mellitus, Type 2 / Q000378:metabolism; D004562:Electrocardiography; D005260:Female; D005951:Glucose Tolerance Test; D006801:Humans; D006973:Hypertension / Q000209:etiology; D008297:Male; D008875:Middle Aged
D001786:Blood Glucose