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지역사회를 대상으로 한 당뇨병 및 당내인성장애 유병률 연구
이홍규(H . K . Lee),김성연(S . Y . Kim),고창순(C . S . Koh),민헌기(H . K . Min),이종구(C . G . Lee),안문영(M . Y . Ahn),김용익(Y . I . Kim),신영수(Y . S . Shin),박용수(Y . S . Park) 대한내과학회 1997 대한내과학회지 Vol.52 No.2
Objectives: Since Korea has been going through a rapid westernization we hypothesize that the rates of diabetes mellitus may begin to be more similar to that seen in the United States or Europe. To determine the prevalence of diabetes mellitus and impaired glucose tolerance(IGT) in Yonchon County of Korea, we performed a population-based survey on diabetes mellitus with random cluster sampling of residents>29 yr of age using oral glucose tolerance test(QGTT). Methods: The study was based on a population- based cross-sectional study with random cluster sampling of residents>29 yr of age. Of 3804 registered residents over 29 yr of age, a total of 2520 (66%) participants had a standard 75g OGTT, completed a detailed questionnaire and had standard anthropometric data collected. Resuls: The raw prevalence of diabetes was 9.1%, and the prevalence of IGT was 11.8%. The prevalence of undiagnosed diabetes(4.7%) was almost 1.4 times higher than that of previously diagnosed diabetes(3.3%). The age- and sex-adjusted prevalence of diabetes mellitus and IGT in people over 30yrs of age, as assessed by the 1990 Korea Population Census, were 7.4 and 9.7%, respectively. Conclusion: The prevalence of diabetes in Yonchon County was substantially higher than previously suggested. The high ratio of the numbers of undiagnosed to diagnosed cases is also of important concern. There has been a need to investigate these increasing prevalence using the same comparative methodologies.
박용수(Y . S . Park),이경진(K . J . Lee),김태화(T . W . Kim),김목현(M . H . Kim),이홍규(H . K . Lee),김성연(S . Y . Kim),고창순(C . S . Hoh),민헌기(H . K . Min) 대한내과학회 1997 대한내과학회지 Vol.52 No.5
Objective: IDDM is an autoimmune disease, which occurs among genetically susceptible individuals. In the Asian populations, it is not uncommon for adult patients with NIDDM to eventually lose beta cell function and develop IDDM. These individuals may be characterized by autoantibodies to GAD and high risk HLA-DQ alleles, which are unlikely to be prevalent among true NIDDM cases or in the general population. The objective of the present study was to evaluate and compare the prevalence of these immunogenetic markers in NIDDM patients and healthy non-diabetic individuals from Korea. Methods: The prevalence of anti-GAD antibodies and HLA-DQA1 and DQB1 alleles among 121 newly diagnosed NIDDM cases identified from a population-based study in Yonchon, Korea and 100 matohed healthy control subjects were evaluated and compared. Results: The overall prevalence of anti-GAD antibodies was 1.7% (2 of 121) in patients with previously undiagnosed NIDDM, whereas 1 of 100 controls had positive antibodies. Among those who were positive, their titer of antibodies to GAD were not high. No statistically significant differences in the distributions of either mean levels of anti-GAD or DQA1 and DQB1 alleles were found comparing NIDDM patients to controls. Conclusion: The low prevalence of anti-GAD antibodies and HLA-DQA1 and DQB1 susceptibility alleles among recent-onset NIDDM patients, which was similar to observations in controls, suggests that diabetes in Korean adults is unlikely to have an autoimmune component to its pathogenesis.
고혈압을 동반한 제 2 형 당뇨병 환자의 섬유소 용해능 및 혈중 Lipoprotein ( a ) 농도
박용수(Y . S . Park),박선양(S . Y . Park),박경수(K . S . Park),김성연(S . Y . Kim),이홍규(H . K . Lee),고창순(C . S . Koh),민헌기(H . K . Min) 대한내과학회 1994 대한내과학회지 Vol.47 No.2
Background: Hypertensive patients have an increased risk profile for cardiovascular disease even in the absence of diabetes mellitus. Much evidence exist to show that insulin resistance plays a key role in eliciting several metabolic. and fibrinolytic abnormalities in patients with hypertension. In patients with type 2 diabetes, the onset of hypertension is associated with obesity, advancing age, and the coexistence of essential hypertension. Much less is known about specific vascular abnormalities. leading to thrombosis and the relationship between the hyperinsulinemia and thrombosis in diabetics. Therefore, we want to compare the fibrinolytic and metabolic profile between the type 2 diabetic patients with and without hypertension to investigate whether coexisting hypertension and diabetes act as additive risk factors to accelerate vascular complication. We also want to assess the relationship between levels of the regulators of fibrinolysis, serum lipid profiles including lipoprotein(a) (Lp(a)) and plasma insulin levels. Methods: In thirty-four type 2 diabetic patients with hypertension and 32 type 2 diabetic patients without hypertension, we measured the levels of tissue plasminogen activator (t-PA) and plasminogen activator inhibitor type 1 (PAI-1), the regulators of the fibrinolysis, lipoprotein profile including serum Lp(a) level and the serum c-peptide concentration, as the degree of insulin resistance. Results: Type 2 diabetic patients with hypertension have increased levels of t-PA (p<0.05), PAI-1 (p<0.05), total cholesterol (p<0.05), and plasma Lp(a) (p<0.05) as compared with those without hypertension. A significant correlation between PAI-1 levels and body mass index (BMI) (r=0.3, p<0,05), fasting C-peptide levels (r =0.54, p<0.01) and serum triglyceride levels (r=0.28, p<0.05) was observed in the diabetic patients. But we could not find a significant association between either t- PA or PAI-1 levels and Lp(a) levels in them. Stepwise forward regression analyses using BMI, fasting C- peptide level, age, systolic blood pressure, HbAlc, triglyceride, t-PA and PAI-1 level as independent variables showed that only the fasting C-peptide levels correlated with PAI-1 levels (F=5,61; p<0.05), Conclusion: These results suggest that the type 2 diabetic patients with hypertension seem to have lower fibrinolysis or higher Lp(a) levels than the normotensive diabetics. It might be possible that coexisting hypertension and diabetes act as additive risk factors to accelerate vascular complication by way of aggravating the level of insulin resistance, when we consider the strong association between the level of hypofibrinolysis and dyslipidemia and the hyperinsulinemia, a measure of insulin resistance in the diabetic patients.
Wavelet 변환을 이용한 음성비화기의 설계 및 구현
홍성민(S.M.Hong),김성환(S.W.Kim),오상엽(S.Y.Oh),유경렬(K.R.Yoo),윤현수(H.Yoon),이홍규(H.K.Lee) 한국정보과학회 1995 한국정보과학회 학술발표논문집 Vol.22 No.1
군용과 같은 특수목적의 음성통신에 주로 사용되는 음성비화기법은 음성을 어떤 형태로든 섞어서 도청자가 알아듣지 못하도록 하는 기술이다. 최근, 디지탈 음성 암호화 기술이 소개되었지만, 디지탈화에 따른 음성암호화기의 속도 및 저속 음성코딩/채널코딩에 따른 음질의 저하 등을 고려해 볼 때, 실제적인 음성통신의 보안을 위해서는 아날로그 음성비화기법이 유용하다. 본 논문에서는 종래의 FFT를 기반으로 하는 음성비화기가 가지는 잔류가청성 등의 문제를, wavelet 변환을 이용하여 설계함으로써 해결할 수 있음을 보인다. 또한, 본 논문에서 설계된 음성비화기에 대해, 실제 음성에 대한 실험을 통하여, 음성의 비화 정도와 복원된 음성의 음질을 평가하였다.