期刊
JOURNAL OF DIABETES RESEARCH
卷 2016, 期 -, 页码 -出版社
HINDAWI LTD
DOI: 10.1155/2016/8797316
关键词
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资金
- National Natural Science Foundation of China [81370943]
- Chinese Society of National Clinical Research Fund [12030420342]
- National Science and Technology Support Plan [2009BAI80B04]
- Ministry of Science and Technology [2013BAI09B13]
- Business Plan of Jinan Students Studying Abroad [20110407]
- Shandong Province Outstanding Young Scientist Research Award Fund [2013BSE27128]
- Shandong Natural Science Foundation [ZR2013HQ046]
- Jinan Young Science and Technology Stars Project [201406011]
- Chinese Medical Association [12020170277, 13040520437]
Objective. To investigate changes in the glycated hemoglobin A1c (A1c) level and those in beta cell function and insulin resistance in newly diagnosed and drug naive type 2 diabetes patients and to evaluate the relationship between them. Design and Methods. A total of 818 newly diagnosed diabetic individuals who were >= 40 years of age were recruited. The subjects were grouped by A1c values (< 6.5%, 6.5-7%, 7-8%, 8-9%, and >= 9%). The homeostasis model assessment (HOMA) was used to evaluate pancreatic beta cell function (HOMA-beta) and insulin resistance (HOMA-IR). ANOVA, t-tests, and binary logistic regression analysis were used for data analysis. Results. Compared with subjects with A1c values < 6.5%, individuals with an A1c of 6.5-7% exhibited an increased HOMA-beta index. However, the HOMA-beta index was significantly decreased at A1c values >= 7% and further decreased by 9.3% and by 23.7%, respectively, at A1c values of 7-8% and 8-9%. As A1c increased to >= 9%, a 62% reduction in beta cell function was observed, independently of age, gender, body mass index (BMI), blood pressure (BP), blood lipids, and hepatic enzyme levels. Meanwhile, insulin resistance was significantly increased with an increase in A1c values. Conclusions. Elevated A1c values (>= 7%) were associated with substantial reductions in beta cell function.
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