- Normative Data of Intima-medial Thickness in Korean Adults and the Estimation of the Relative Risk of Macrovascular Diseases Using this Data in Type 2 Diabetic Subjects.
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H J Kim, Y J Won, D J Kim, C W Ahn, B S Cha, S K Lim, K R Kim, H C Lee, K B Huh
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Korean Diabetes J. 2003;27(3):288-298. Published online June 1, 2003
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 Abstract
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- BACKGROUND
The reference values of the carotid mean intima-medial thickness (IMT), in subjects without diabetes or macrovascular diseases, were estimated, which were used to establish the relative risks of macrovascular diseases in type 2 diabetic subjects. METHODS: High resolution B-mode ultrasonography was performed in 1229 nondiabetic subjects, without ischemic heart disease, cerebral infarction or peripheral vascular disease, and in 830 type 2 diabetic subjects. The nondiabetic subjects were participating in medical checkups at the Health Promotion Center. The height, weight, systolic blood pressure, diastolic blood pressure, fasting plasma glucose, total cholesterol, triglyceride, high density lipoprotein-cholesterol and fasting insulin level were measured in all subjects. RESULTS: The nondiabetic subjects, without ischemic heart disease, cerebral infarction or peripheral arterial obstructive diseases, were classified by age (31~40, 41~50, 51~60, 61~70 and >70 years) and sex. There were significant differences between the diabetic and nondiabetic subjects in relation to the age groups, but no significant difference was found between the sexes. Independent risk factors associated with the carotid mean IMT in the nondiabetic subjects were age, systolic blood pressure and body mass index, and those in the diabetic subjects were age, duration of diabetes and a low density lipoprotein-cholesterol level. The relative risks of ischemic heart disease, cerebral infarction and peripheral vascular disease, due to the presence of an increased IMT, were 2.34 (CI; 1.32~4.14), 2.95 (CI; 1.57~5.54) and 3.64 (CI; 1.79~7.40) in the diabetic subjects. CONCLUSION: It was concluded that the reference values of the IMT, as classified by age, in the subjects without diabetes or macrovascular diseases, favorably reflected the risks of macrovascular diseases in the type 2 diabetic subjects
- Measurement of Insulin Sensitivity Index Estimated from LDIGIT ( Continuous Low Dose Insulin and Glucose Infusion Test.
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Young Duk Song, Bong Soo Cha, Suk Won Park, Young Joon Won, Soo Yeon Nam, Sung Kil Lim, Kyung Rae Kim, H C Lee, K B Huh
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Korean Diabetes J. 1997;21(4):425-431. Published online January 1, 2001
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Abstract
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- BACKGROUND
Measurement of insulin sensitivity index by continuous low dose insulin and glucose infusion test(LDIGIT) has been reported to be simple and reliable. METHODS: The method is a refinement of the modified Harano test and consisted of continuous low dose insulin(25mU/kghr) and glucose(4mg/kghr) infusion lasting 150 min. Insulin sensitivity was evaluated as the amount of glucose infusion divided by the steady state serum insulin and glucose levels achieved at the end of the test. Insulin secretion was expressed as the incremental area for C-peptide concentration during the first 15 min of the test. The indices of insulin sensitivity and insulin secretion yielded by LDIGIT were compared with those derived from the euglycemic clamp and oral glucose tolerance test (OGTT), respectively. Thirteen subjects underwent LDIGIT and euglycemic clamp. RESULTS: LDIGIT resulted in stable final glucose levels but 3 subjects showed hypoglycemia during the test. The index of insulin secretion provided by LBIGIT did not correlate well with that of OGTT. There was a significant correlation between the ISI (insulin sensitivity index) determined by LDIGIT and the ISI determined by clamp(r=0.60, p<0.05). CONCLUSION: LDIGIT is a simple and accurate methcd to assess insulin sensitivity. It can be used in population studies and in situations when more complex technique is not feasible. However, it is desirable to reduce the insulin infusion rate to avoid the occurrence of hypoglycemia in Koreans.
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KDA
