- Prevalence of Diabetes Mellitus and Impaired Glucose Tolerance in Korean Adults Living in Jungup District, South Korea.
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Young Il Kim, Chul Soo Choi, Sang Wook Kim, Jong Soo Lee, Hyeong Ho Kim, Moo Sung Lee, Sang Il Lee, Joong Yeoul Park, Sung Kwan Hong, Ki Up Lee
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Korean Diabetes J. 1998;22(3):363-371. Published online January 1, 2001
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 Abstract
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- BACKGROUND
Similar to other countries that underwent industrialization in recent years, the prevalence of diabetes has increased dramatically in Far East Asian countries. While the prevalence of diabetes in South Korean adults was estimated to be less than 0.5% in 1960s, a recent study from Yonchon County showed a dramatic increase to 7.2%. This was the only study performed in population-based subjects. We studied the prevalence of diabetes and impaired glucose tolerance(IGT) among subjects living in Jungup clistrict, Chonlabuk-do, South Korea. METHODS: Among a total of 28,380 subjects aged over 40 years living in Jungup district a sample of 1,791 subjects living in six villages was selected using a random cluster sampling method. Among these subjects, 1,108 subjects(61.9%) completed 75g oral glucose tolerance test(OGTT). RESULTS: When the WHO criteria were used, the prevalence of diabetes and IGT were 7.1% and 8.5%, respectively, after correction for Segi's standard world population. Among the diabetic subjects, 62% of the patients did not know that they had diabetes previously. When the 1997 ADA criteria after OGTT were employed, the prevalence of diabetes and IGT/IFG(impaired fasting glucose) was 8.5% and 11.1%, respectively. The mean body mass index(BMI) of whole subjects was 22.9+2.7 for men and 24.3+3.2kg/m for women. Among subjects with normal glucose tolerance, IGT and diabetes, 31.5%, 42.3% and 50.0% of subjects were currently obese(BMI >25kg/m), respectively. The prevalence of both diabetes and IGT increased with inereasing waist-to-hip ratio(WHR) in men and women. On the other hand, the prevalence of diabetes and glucose intolerance increased with increasing BMI only in women but not in men. CONCLUSION: The prevalence of diabetes and IGT in the present study was quite similar to that in the previous Yonchon study. This prevalence of diabetes is higher than or similar to that reported in the Caucasian(~ 3% 8%), even though mean BMI of this community population(23.9 kg/m) is lower than that in the Caucasian (24.5~28.0 kg/m). It can be speculated that Far East Asian penple are more prone to develop diabetes for their degree of obesity.
- Changes in Serum True Insulin and C-peptide Levels during Oral Glucose Tolerance Test in Koreans with Glucose Intolerance.
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Young Il Kim, Chul Soo Choi, Sang Wook Kim, Hong Kyu Kim, Chul Hee Kim, Joong Yeol Park, Sung Kwan Hong, Ki Up Lee
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Korean Diabetes J. 1998;22(2):192-198. Published online January 1, 2001
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- BACKGROUND
Previous studies have shown that progression from normal glucose tolerance(NGT) to impaired glucose tolerance(IGT) is associated with the development of insulin resistance and hyper-insulinemia, while further progression from IGT to NIDDM results from an inability of the 8-cell to maintain high rate of insulin secretion. However, it is not established whether similar findings are also observed in Korean subjects with glucose intolerance. The aim of this study was to examine insulin secretory response after oral glucose stimulation in obese and non-obese Korean subjects according to varying degree of glucose intolerance. METHODS: Eighty eight Korean men underwent 75g oral glucose tolerance test. The subjects were classified into NGT(n=30), IGT(n=23), NIDDM(n= 35) according to National Diabetes Data Group criteria. Obesity was defined as body mass index (BMI) > 25 kg/m . Serum true insulin and C-peptide concentrations were measured by radioimmunoassay. RESULTS: Fasting serum true insulin and C-peptide levels were not different from each other among NGT, IGT and NIDDM groups, both in obese and non-obese subjects. Obese subjects with IGT had significantly higher serum true insulin and C-peptide levels at 120 min than those in NGT subjects, but the levels at 30 and 60 min were not different. On the other hand, non-obese subjects with IGT had lower serum true insulin level at 30 min and lower serum C-pepitde level at 60 min compared to those in NGT subjects. True insulin and C-pepitde levels at 30 and 60 min were significantly lower in patients with NIDDM than in those with NGT, both in obese and non-obese subjects. CONCLUSION: Hyperinsulinemia, especially at a later phase of oral glucose tolerance test, is apparent in obese subjects with IGT. On the other hand, early phase insulin secretory defect is prominent in non-obese subjects with IGT. These results suggest that impaired insulin secretion may play a primary role in the pathogenesis of non-obese NIDDM in Korea.
- A study of gastric emptying time and effect of cisapride in diabetic patients.
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Yong Ki Kim, Kyoung Seog Lee, Jae Bok Lee, Chul Soo Choi, In Joo Kim
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Korean Diabetes J. 1993;17(4):403-410. Published online January 1, 2001
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- No abstract available.
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