期刊
ENDOCRINOLOGY AND METABOLISM
卷 31, 期 2, 页码 320-327出版社
KOREAN ENDOCRINE SOC
DOI: 10.3803/EnM.2016.31.2.320
关键词
Glucose tolerance test; C-peptide; Insulin secretion and incident diabetes
Background: Diabetes can be efficiently prevented by life style modification and medical therapy. So, identification for high risk subjects for incident type 2 diabetes is important. The aim of this study is to identify the best beta-cell function index to identify high risk subjects in non-diabetic Koreans. Methods: This is a retrospective longitudinal study. Total 140 non-diabetic subjects who underwent standard 2-hour 75 g oral glucose tolerance test from January 2007 to February 2007 at Kangbuk Samsung Hospital and followed up for more than 1 year were analyzed (mean follow-up, 54.9 +/- 16.4 months). The subjects were consist of subjects with normal glucose tolerance (n=44) and subjects with prediabetes (n=97) who were 20 years of age or older. Samples for insulin and C-peptide levels were obtained at 0 and 30 minutes at baseline. Results: Thirty subjects out of 140 subjects (21.4%) developed type 2 diabetes. When insulin-based index and C-peptide-based index are compared between progressor and non-progressor to diabetes, all C-peptide-based indices were statistically different between two groups, but only insulinogenic index and disposition index among insulin-based index were statistically different. C-peptide-based index had higher value of area under receiver operating characteristic curve (AROC) value than that of insulinbased index. C-peptidogenic index had highest AROC value among indices (AROC, 0.850; 95% confidence interval, 0.761 to 0.915). C-peptidogenic index had significantly higher AROC than insulinogenic index (0.850 vs. 0.731 respectively; P=0.014). Conclusion: C-peptide-based index was more closely related to incident type 2 diabetes in non-diabetic subjects than insulinbased index.
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