Diabetes & Metabolism Journal

Seok Won Park (Park SW)

18 Articles

Transcription Factor Profile by Degenerate RT-PCR/SSCP: Application in 3T3-L1 Adipocyte Treated with TNF-alpha.: Yoo Lee Kim, Sang Hwa Lee, Young Kil Choi, Seo Yoon Chang, Yun Soo Kim, Soo Kyung Kim, Seok Won Park, Won Kun Park, Yong Wook Cho, Sang Jong Lee; Korean Diabetes J. 2007;31(5):410-420. Published online September 1, 2007; DOI: https://doi.org/10.4093/jkda.2007.31.5.410

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Abstract PDF: BACKGROUND
Several high-throughput gene analysis techniques - differential display PCR, suppression subtraction hybridization (SSH), serial analysis of gene expression (SAGE), and DNA microarray - have permitted transcriptome profiling to understand the molecular pathogenesis of multifactorial diseases. But these techniques are of no great utility regarding feasibility, reproducibility, cost, and the amount of material required for analysis. To establish more practical method for transcription factor transcriptome profiling, we combined degenerate reverse transcriptase-polymerase chain reaction (RT-PCR) and single strand conformational polymorphism (SSCP) technique. METHODS: We categorized 417 human/mouse transcription factor mRNA into 92 small groups according to homology with ClustalW method and established 92 degenerate RT-PCR including common motives of the 92 small groups with the software program of CODEHOP, Primer Premier, Amplify 1.2. Further analysis on the amplified PCR products was performed by SSCP. This system was applied for the evaluation of changes on transcription factor transcriptome of differentiated 3T3-L1 adipocyte treated with TNF-alpha. RESULTS: 82 groups and 52 groups showed amplification of PCR before and after TNF-alpha treatment respectively and 24 groups showed significant amplification difference after TNF-alpha treatment. After TNF-alpha treatment for 48 hours, mRNA expressions of group 7, 30, and 33 which include adipocyte related transcription factors such as CEBP-alpha, RXR-alpha, PPAR-gamma were downregulated and mRNA expression of group 8 including preadipocyte abundant CEBP-beta was upregulated. These results are largely concordant with the results analyzed by oligonucleotide microarray. Randomly selected single PCR bands of group 28 and 75 on agarose electrophoresis displayed additional multiple bands by SSCP and necessitated addition of this technique to degenerate RT-PCR for further analysis. CONCLUSION: It could be suggested that degenerate RT-PCR/SSCP is practical method and could be used as a screening test for transcriptome profiling of various disease states with further validation study.

Current Status of Diabetes Management in Korea Using National Health Insurance Database.: Seok Won Park, Dae Jung Kim, Kyung Wan Min, Sei Hyun Baik, Kyung Mook Choi, Ie Byung Park, Jeong Hyun Park, Hyun Shik Son, Chul Woo Ahn, Jee Young Oh, Juneyoung Lee, Choon Hee Chung, Jaiyong Kim, Hwayoung Kim; Korean Diabetes J. 2007;31(4):362-367. Published online July 1, 2007; DOI: https://doi.org/10.4093/jkda.2007.31.4.362

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BACKGROUND
The prevalence of diabetes is steadily increasing in Korea. The increase in number of people with diabetes would ultimately result in premature death, poor quality of life, and increasing economic burden. However, in our country, researches regarding on the quality of diabetes management are lacking. This study was conducted in 2005 using National Health Insurance Database to know the current status of diabetes management in Korea. METHODS: We have randomly selected 3,902 subjects out of 2,503,754 subjects who had claims with diagnosis of diabetes between January 2003 to December 2003 by using two staged cluster sampling method. Field survey with review of medical records and telephone survey was conducted with standardized record forms developed by Korean Diabetes Association; Task Force Team For Basic Statistical Study of Korean Diabetes Mellitus. RESULTS: The age of diabetic subjects was 58.1 +/- 12.6 years and the duration of diabetes was 6.2 +/- 5.5 years. Hypertension was present in 54% of diabetic subjects. Among those with hypertension, 59% were controlled with blood pressure below 140/90 mmHg, but only 19% were controlled with blood pressure below 130/80 mmHg. Hyperlipidemia was present in 29% of diabetic subjects. Only 38% of those with hyperlipidemia were controlled with LDL-cholesterol below 100 mg/dL. For glycemic control, only 40% of diabetic subjects achieved the goal of HbA1c less than 7%, which was suggested by ADA. CONCLUSION: We found that only 20~40% of diabetic subjects in Korea achieved the management goal for glucose, blood pressure, and lipids. It seems urgent to develop a quality management program for diabetes subjects in Korea.

Citations

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The Open Nursing Journal.2020; 14(1): 64. CrossRef
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The Effectiveness of Multidisciplinary Team-Based Education in the Management of Type 2 Diabetes
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The Journal of Korean Diabetes.2018; 19(2): 119. CrossRef
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Jin-Hyun Yu, Jin-Seok Kim, Mee-Ra Lee, Seong-Yong Yoon, Seong-Yong Cho, Seung-Hyun Yoo, Boo-Il Kim
Annals of Occupational and Environmental Medicine.2016;[Epub] CrossRef
Relationship Between Duration of Type 2 Diabetes and Self-Reported Participation in Diabetes Education in Korea
Jongnam Hwang, Jeffrey A. Johnson
Asia Pacific Journal of Public Health.2015; 27(2): NP311. CrossRef
Current Status of Management in Type 2 Diabetes Mellitus at General Hospitals in South Korea
Jin-Hee Jung, Jung-Hwa Lee, Jin-Won Noh, Jeong-Eun Park, Hee-Sook Kim, Joo-Wha Yoo, Bok-Rye Song, Jeong-rim Lee, Myeong-Hee Hong, Hyang-Mi Jang, Young Na, Hyun-Joo Lee, Jeong-Mi Lee, Yang-Gyo Kang, Sun-Young Kim, Kang-Hee Sim
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Trend Analysis in the Prevalence of Type 2 Diabetes According to Risk Factors among Korean Adults: Based on the 2001~2009 Korean National Health and Nutrition Examination Survey Data
Young-Ju Kim, Myoung-Nam Lim, Dong-Suk Lee
Journal of Korean Academy of Nursing.2014; 44(6): 743. CrossRef
Evaluating Chronic Care of Public Health Centers in a Metropolitan City
Yong-Jun Choi, Dong-Soo Shin, Minah Kang, Sang-Soo Bae, Jaiyong Kim
Health Policy and Management.2014; 24(4): 312. CrossRef
Increasing risk of diabetes mellitus according to liver function alterations in electronic workers
Kyoungho Lee, Joohee Han, Soo‐Geun Kim
Journal of Diabetes Investigation.2014; 5(6): 671. CrossRef
The Effect of the Experience of Diabetes Education on Knowledge, Self-Care Behavior and Glycosylated Hemoglobin in Type 2 Diabetic Patients
Seung Hei Moon, Young Whee Lee, Ok-Kyung Ham, Soo-Hyun Kim
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Current Status of Prescription in Type 2 Diabetic Patients from General Hospitals in Busan
Ji Hye Suk, Chang Won Lee, Sung Pyo Son, Min Cheol Kim, Jun Hyeob Ahn, Kwang Jae Lee, Ja Young Park, Sun Hye Shin, Min Jeong Kwon, Sang Soo Kim, Bo Hyun Kim, Soon Hee Lee, Jeong Hyun Park, In Joo Kim
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Effect of Self-Monitoring of Blood Glucose Based Diabetes Self-Management Education on Glycemic Control in Type 2 Diabetes
Kang Hee Sim, Moon Sook Hwang
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Diabetes Epidemics in Korea: Reappraise Nationwide Survey of Diabetes "Diabetes in Korea 2007"
Ie Byung Park, Jaiyong Kim, Dae Jung Kim, Choon Hee Chung, Jee-Young Oh, Seok Won Park, Juneyoung Lee, Kyung Mook Choi, Kyung Wan Min, Jeong Hyun Park, Hyun Shik Son, Chul Woo Ahn, Hwayoung Kim, Sunhee Lee, Im Bong Lee, Injeoung Choi, Sei Hyun Baik
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Total Energy Intake May Be More Associated with Glycemic Control Compared to Each Proportion of Macronutrients in the Korean Diabetic Population
Hye Mi Kang, Dong-Jun Kim
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Effect of Soybeans, Chungkukjang, and Doenjang on Blood Glucose and Serum Lipid Profile in Streptozotocin-induced Diabetic Rats
Ah-Ra Kim, Jae-Joon Lee, Sun-Sook Cha, Hae-Choon Chang, Myung-Yul Lee
Journal of the Korean Society of Food Science and Nutrition.2012; 41(5): 621. CrossRef
Comparative Study on Self-Care Behavior, Diabetes-related Stress, and Stress Coping among Good, Inadequate, and Poor Glycemic Control Groups
Hye-Yeon Kang, Mee-Ock Gu
Journal of Korean Academy of Fundamentals of Nursing.2012; 19(2): 168. CrossRef
Education as Prescription for Patients with Type 2 Diabetes Mellitus: Compliance and Efficacy in Clinical Practice
Mi Yeon Kim, Sunghwan Suh, Sang-Man Jin, Se Won Kim, Ji Cheol Bae, Kyu Yeon Hur, Sung Hye Kim, Mi Yong Rha, Young Yun Cho, Myung-Shik Lee, Moon Kyu Lee, Kwang-Won Kim, Jae Hyeon Kim
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Biological Effect of Vaccinium uliginosum L. on STZ-induced Diabetes and Lipid Metabolism in Rats
Eun-Kyung Han, Hyuck-Se Kwon, Se-Gye Shin, Yoon-Hee Choi, Il-Jun Kang, Cha-Kwon Chung
Journal of the Korean Society of Food Science and Nutrition.2012; 41(12): 1727. CrossRef
Comparative Study on HbA1C, Self-care Behavior, and Quality of Life by Depression Status in Type II Diabetic Patients
Young-Min Jeong, Mi-Young Kim
Journal of Korean Academy of Fundamentals of Nursing.2012; 19(3): 353. CrossRef
Therapeutic Target Achievement in Type 2 Diabetic Patients after Hyperglycemia, Hypertension, Dyslipidemia Management
Ah Young Kang, Su Kyung Park, So Young Park, Hye Jeong Lee, Ying Han, Sa Ra Lee, Sung Hwan Suh, Duk Kyu Kim, Mi Kyoung Park
Diabetes & Metabolism Journal.2011; 35(3): 264. CrossRef
Bowl-Based Meal Plan versus Food Exchange-Based Meal Plan for Dietary Intake Control in Korean Type 2 Diabetic Patients
Hee-Jung Ahn, Boo-Kyung Koo, Ji-Yeon Jung, Hwi-Ryun Kwon, Hyun-Jin Kim, Kang-Seo Park, Kyung-Ah Han, Kyung-Wan Min
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An Evaluation of Sampling Design for Estimating an Epidemiologic Volume of Diabetes and for Assessing Present Status of Its Control in Korea
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The Current Status of Type 2 Diabetes Management at a University Hospital
Young Sil Lee
Korean Diabetes Journal.2009; 33(3): 241. CrossRef
The Effect of Gamma-Glutamyltransferase on Impaired Fasting Glucose or Type 2 Diabetes in Korean Men
Tae-Yeon Kim, Do-Hoon Kim, Chang-Hae Park, Kyung-Hwan Cho, Seung-Hwan Lee, Hyuk Ga, Hwan-cheol Kim
Korean Diabetes Journal.2009; 33(3): 215. CrossRef
Management of Diabetic Mellitus in Low-income Rural Patients
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The Effect of Smoking Status upon Occurrence of Impaired Fasting Glucose or Type 2 Diabetes in Korean Men
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Journal of Preventive Medicine and Public Health.2008; 41(4): 249. CrossRef

Current Status of the Continuity of Ambulatory Diabetes Care and its Impact on Health Outcomes and Medical Cost in Korea Using National Health Insurance Database.: Jaiyong Kim, Hyeyoung Kim, Hwayoung Kim, Kyung Wan Min, Seok Won Park, Ie Byung Park, Jeong Hyun Park, Sei Hyun Baik, Hyun Shik Son, Chul Woo Ahn, Jee Young Oh, Sunhee Lee, Juneyoung Lee, Choon Hee Chung, Kyung Mook Choi, Injeoung Choi, Dae Jung Kim; Korean Diabetes J. 2006;30(5):377-387. Published online September 1, 2006; DOI: https://doi.org/10.4093/jkda.2006.30.5.377

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Abstract PDF

BACKGROUND
The continuity of care in chronic diseases, especially in diabetes, was emphasized from many studies. But large scale studies with long-term observation which confirm the impact of continuity of care on health outcomes are rare. This study tried national level 3 year observation to find differences in hospitalization, mortality and medical costs among patient groups with different utilization pattern. METHODS: The 1,088,564 patients with diabetes diagnosis and diabetes drug prescription in 2002, from 20 to 79 years old, and survived until the end of 2004 were included. Annual drug prescription days, number of visited clinics and quarterly continuity of care were measured. Gender, age group, living area, health insurance premium level (as a proxy of the income level), years of first DM diagnosis, five co-morbidities (hypertension, heart disease, stroke, renal disease, admission with DM), hospitalization experience and the type of main attending clinic were adjusted. Hospitalization, mortality and high costs group (top quintile) in 2005 were predicted by multiple logistic regression model. RESULTS: Patients who failed in continuity of care in 2003 and 2004 showed higher hospitalization (OR =1.29), higher mortality (OR =1.75) and they are more likely to be high costs group (OR =1.34) in 2005 than who fulfilled the continuity of care. Patients who have single attending clinic also showed lower hospitalization, lower mortality and lower cost. Completeness in diabetic drug prescription were correlated with lower hospitalization, lower mortality but with higher cost. Possible cost saving from continual care with single attending clinic was estimated at Won 417 billion (Dollar 1 = Won 943.7). Possible expenditure from complete drug prescription was Won 228 billion. So, net saving was Won 139 billion in our study population. CONCLUSION: Continual care and single attending clinic saves patient's life and national costs. Fragmented primary care system in Korea should be reformed for more effective care of chronic diseases. National Health Insurance Database in Korea enables nationwide long-term observation study which overcomes the many limitations found in hospital-based studies and cross-sectional surveys.

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International Journal of Environmental Research and Public Health.2021; 18(15): 7977. CrossRef
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Diabetes & Metabolism Journal.2019; 43(6): 776. CrossRef
Chasms in Achievement of Recommended Diabetes Care among Geographic Regions in Korea
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Ye-Jee Kim, Nam-Kyong Choi, Mi-Sook Kim, Joongyub Lee, Yoosoo Chang, Jong-Mi Seong, Sun-Young Jung, Ju-Young Shin, Ji-Eun Park, Byung-Joo Park
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Factors Affecting Diabetic Screening Behavior of Korean Adults: A Multilevel Analysis
Hyeongsu Kim, Minjung Lee, Haejoon Kim, Kunsei Lee, Sounghoon Chang, Vitna Kim, Jun Pyo Myong, Soyoun Jeon
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Higher quality primary care is associated with good self-rated health status
N. J. Sung, J. F. Markuns, K. H. Park, K. Kim, H. Lee, J. H. Lee
Family Practice.2013; 30(5): 568. CrossRef
Diabetes Epidemics in Korea: Reappraise Nationwide Survey of Diabetes "Diabetes in Korea 2007"
Ie Byung Park, Jaiyong Kim, Dae Jung Kim, Choon Hee Chung, Jee-Young Oh, Seok Won Park, Juneyoung Lee, Kyung Mook Choi, Kyung Wan Min, Jeong Hyun Park, Hyun Shik Son, Chul Woo Ahn, Hwayoung Kim, Sunhee Lee, Im Bong Lee, Injeoung Choi, Sei Hyun Baik
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Jae-Seok Hong, Hee-Chung Kang
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Heui Sug Jo
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Factors associated with diabetes outpatient use of tertiary or general hospitals as their usual source of care in Korea
Jung Chan Lee, Kye Hyun Kim, Han Nah Kim, Nam Soon Kim
Journal of the Korean Medical Association.2012; 55(12): 1215. CrossRef
Factors associated with the hypertension outpatients' choice of healthcare providers in Korea
Jung Chan Lee, Kye Hyun Kim, Han Nah Kim, Yoon Hyung Park
Journal of the Korean Medical Association.2011; 54(9): 961. CrossRef
Analysis of the Continuity of Outpatient among Adult Patients with hypertension and its Influential Factors in Korea
Kyung-Ae Son, Yoon-Shin Kim, Min-Hee Hong, Mi-As Jeong
Journal of the Korea Academia-Industrial cooperation Society.2010; 11(6): 2161. CrossRef
Continuity of Care for Elderly Patients with Diabetes Mellitus, Hypertension, Asthma, and Chronic Obstructive Pulmonary Disease in Korea
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Current Status of Diabetic Foot in Korean Patients Using National Health Insurance Database.: Choon Hee Chung, Dae Jung Kim, Jaiyong Kim, Hyeyoung Kim, Hwayoung Kim, Kyung Wan Min, Seok Won Park, Jeong Hyun Park, Sei Hyun Baik, Hyun Shik Son, Chul Woo Ahn, Jee Young Oh, Sunhee Lee, Juneyoung Lee, Kyung Mook Choi, Injeoung Choi, Ie Byung Park; Korean Diabetes J. 2006;30(5):372-376. Published online September 1, 2006; DOI: https://doi.org/10.4093/jkda.2006.30.5.372

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Abstract PDF

BACKGROUND
Foot ulcer diseases are more prevalent in diabetic patients than that those of non-diabetic patients. Several reports showed the risk of amputation and the medical cost were increased when foot ulcer developed. Therefore, strict glycemic control from the initial period of diabetes is necessary. Since there is no enough epidemiologic data, large scaled studies for medical and economic consequences about diabetic foot ulcer are needed. METHODS: This study was based on health insurance claims submitted to the National Health Insurance Review Agency during the period from December 1994 through December 2002. We investigated the incidence and medical cost of foot disorders in Korean population using the disease-classification codes on the health insurance claim forms. RESULTS: The incidences of foot disorders (per 100,000 of population) were 49.7 for amputations, 99.7 for ulcers, and 1,051 for injuries in diabetic patients, and 4.2 for amputations, 10.3 for ulcers, and 943 for injuries in non-diabetic patients. Relative risk of the incidences of foot amputation, ulcer, and injury in diabetic patients comparing with non-diabetic patients were 11.7, 9.7, and 1.1, respectively. Total medical costs (per capita) of foot amputation, ulcer, and injury in diabetic patients were 2.0, 1.7, and 2.1 times higher, respectively, than those of non-diabetic patients. Mean hospital stay of foot amputation, ulcer, and injury in diabetic patients were 1.6, 1.3, and 1.7 times more, respectively, than those of non-diabetic patients. CONCLUSION: In diabetic patients, the incidences of foot amputation and ulcer are higher than those of non-diabetic patients. To reduce those incidences, we need to early strict glycemic control as well as government based management.

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Diabetes Epidemics in Korea: Reappraise Nationwide Survey of Diabetes "Diabetes in Korea 2007"
Ie Byung Park, Jaiyong Kim, Dae Jung Kim, Choon Hee Chung, Jee-Young Oh, Seok Won Park, Juneyoung Lee, Kyung Mook Choi, Kyung Wan Min, Jeong Hyun Park, Hyun Shik Son, Chul Woo Ahn, Hwayoung Kim, Sunhee Lee, Im Bong Lee, Injeoung Choi, Sei Hyun Baik
Diabetes & Metabolism Journal.2013; 37(4): 233. CrossRef
Treatment of Diabetic Foot Ulcer Using Matriderm In Comparison with a Skin Graft
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Three Cases of Auricular Pressure Ulcer in Ambulatory Leprotic Patients
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Diabetic Foot: Past and Present
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Epidemiology of Diabetic Foot Disease
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Current Status of Aspirin User in Korean Diabetic Patients Using Korean Health Insurance Database.: Ie Byung Park, Dae Jung Kim, Jaiyong Kim, Hyeyoung Kim, Hwayoung Kim, Kyung Wan Min, Seok Won Park, Jeong Hyun Park, Sei Hyun Baik, Hyun Shik Son, Chul Woo Ahn, Jee Young Oh, Sunhee Lee, Juneyoung Lee, Choon Hee Chung, Injeoung Choi, Kyung Mook Choi; Korean Diabetes J. 2006;30(5):363-371. Published online September 1, 2006; DOI: https://doi.org/10.4093/jkda.2006.30.5.363

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AIMS: ADA guidelines recommend aspirin for all patients with diabetes who have had a prior CHD events as well as a primary prevention strategy among those with at least one other risk factor. We examined the current status of regular aspirin intake among Korean adults who diagnosed as diabetes. METHODS: This study examined the characteristics of aspirin user in new-onset diabetes over 40 years based on health insurance claims submitted to the Health Insurance Review Agency (HIRA) of Korea during the period from January 2001 through December 2003. New onset diabetes defined as the first health insurance claim of antidiabetic drugs submitted to HIRA for the three months (January to March 2001) that never submitted for previous 6 years. RESULTS: The number of total new-onset diabetic patients was 30,014 in 2001, 29,819 in 2002, and 32,061 in 2003. The incidence rate of diabetes over 40 years for 3 months in 2001, 2002 and 2003 were 0.172%, 0.167% and 0.18. Mean age of women who diagnosed diabetes were significant higher than that of men in 2001 (women 59.2+/-10.6 yrs, men 54.8+/-9.8 yrs), in 2002 (women 59.5+/-10.6 yrs, men 54.6+/-9.3 yrs) and in 2003 (women 59.6+/-10.7 yrs, men 54.7+/-9.9 yrs) (p < 0.001). The number of aspirin user increased from 2,065 (6.9%) in 2001, 2,638 (8.9%) in 2002 and 3,711 (11.6%) in 2003. 30.5% of new-onset diabetics in 2001 had hypertension, 12.4% of them had hypercholesterolemia, 11.8% of them had cerebral infarct, 2.6% of them had cerebral hemorrhage, 3.8% of them had coronary heart disease and, but, 55.6% of them had not any CVD. Logistic regression analysis using aspirin use as a dependent variable showed that the number of aspirin use in patients with hypertension, hypercholesterolemia, cerebral infarct and coronary heart disease was higher than in patients without those (hypertension [OR], 3.89 (95% CI, 3.52~4.31); hypercholesterolemia [OR], 2.16 (95% CI, 1.90~2.46; cerebral infarct [OR], 2.05 (95% CI, 1.82~2.30); coronary heart disease [OR], 9.41 (95% CI, 8.20~10.80), respectively). Coronary heart disease was the most important associated factor of aspirin use. CONCLUSIONS: We found significant underuse of aspirin therapy among our population compared with that of America. Major efforts are needed to increase aspirin use in diabetic patients.

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Evaluation of low-dose aspirin for primary prevention of ischemic stroke among patients with diabetes: a retrospective cohort study
Ye-Jee Kim, Nam-Kyong Choi, Mi-Sook Kim, Joongyub Lee, Yoosoo Chang, Jong-Mi Seong, Sun-Young Jung, Ju-Young Shin, Ji-Eun Park, Byung-Joo Park
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Current Status of Diabetic End-Stage Renal Disease Using Korean Health Insurance Database.: Dae Jung Kim, Jaiyong Kim, Hyeyoung Kim, Kyung Wan Min, Seok Won Park, Ie Byung Park, Jeong Hyun Park, Sei Hyun Baik, Hyun Shik Son, Chul Woo Ahn, Jee Young Oh, Sunhee Lee, Juneyoung Lee, Choon Hee Chung, Kyung Mook Choi, Injeoung Choi, Hwayoung Kim; Korean Diabetes J. 2006;30(5):355-362. Published online September 1, 2006; DOI: https://doi.org/10.4093/jkda.2006.30.5.355

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BACKGROUND
Diabetes is becoming one of the main causes of end-stage renal disease (ESRD) worldwide. We studied the prevalence and incidence of end-stage renal disease (ESRD) in the Korean population based on health insurance claims submitted to the Health Insurance Review Agency. We also investigated the proportion of medications taken by the ESRD patients, and frequency of hospital admission or visits, and medical expenses between ESRD patients with and without diabetes. METHODS: This study was based on health insurance claims submitted to the Health Insurance Review Agency during the period from January 2001 through December 2003. Using the disease-classification codes on the health insurance claim forms, those who were diagnosed with chronic renal disease (N18 or N19) and received dialysis-related treatment (Z49), treatment with a kidney dialysis machine (Z99.2), or kidney transplantation (Z94.0) were defined as ESRD patients. Among the ESRD patients, those who were diagnosed with diabetes (E10-E14) and/or took anti-diabetic drugs were defined as ESRD patients with diabetes. RESULTS: The ESRD patients totaled 33,870 in 2001, 37,894 in 2002, and 41,167 (858.3 per million population) in 2003. ESRD patients with diabetes increased to 56.7% in 2003. The number of ESRD patients in whom renal replacement therapy was initiated was 8,134 in 2002 and 8,322 (173.5 per million population) in 2003. ESRD patients with diabetes used more anti-hypertensive drugs (1.2 times as many), lipid-lowering drugs (1.6 times), and anti-platelet agents (1.8 times) than did ESRD patients without diabetes. In 2003, 66.5% of the ESRD patients with diabetes were hospitalized, which was 1.6 times the hospital admissions of ESRD patients without diabetes. ESRD patients with diabetes also had hospital stays that were 1.6 times longer per patient and inpatient service expenses that were 1.6times greater per patient, compared with those reported for ESRD patients without diabetes. CONCLUSION: The incidence of ESRD accompanied by diabetes has risen rapidly. Given the burden of medical treatment costs placed on ESRD patients with diabetes, more aggressive interventions should be implemented to prevent diabetes and renal complications among patients with diabetes.

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Perspectives of Diabetes Treatment using Human Pluripotent Stem Cells.: Seok Won Park, Hyung Min Chung, Yong Wook Cho; Korean Diabetes J. 2002;26(5):307-313. Published online October 1, 2002

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Limitation of Validity of Homeostasis Model Assessment as a Index of Insulin Resistance.: Yong Seok Yun, Seok Won Park, Young Duk Song, Hyo Kyung Park, Oh Yoen Kim, Chul Woo Ahn, Jae Hyun Nam, Su Youn Nam, Bong Soo Cha, Chong Ho Lee, Sumg Gil Lim, Kyung Rae Kim, Hyun Chul Lee, Kap Bum Huh; Korean Diabetes J. 2000;24(5):541-551. Published online January 1, 2001

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Abstract: BACKGROUND
Homeostasis model assessment of insulin resistance (HOMAIR) had been proposed as a simple and inexpensive alternative to other complex procedures measuring insulin resistance. We evaluated the validity of HOMAIR, comparing to total glucose disposal rate measured by euglycemic clamp test in 63 subjects with normal glucose tolerance, 21 with impaired glucose tolerance and 47 with type 2 DM. METHODS: HOMAIR and HOMA cell function (Homeostasis model assessment of cell function) were calculated with formula described by Matthews [HOMAIR: fasting insulin ( U/mL) X fasting glucose (mmol/L) / 22.5, HOMA cell function: 20 X fasting insulin ( U/mL) / (fasting glucose (mmol/L) - 3.5)]. 2-hour euglycemic (5 mmol/L) hyper insulinemic (717 pmol/L) clamp test were carried out. RESULTS: The strong inverse correlation (r=-0.658, <0.001) was shown between log transformed HOMAIR and total glucose disposal rates. The agreement of two methodes in the categorization according to insulin resistance was moderate (weighed kappa=0.45). The magnitude of correlation coefficients were smaller in subjects with lower BMI (BMI < 23.7 kg/m2, r = -0.441 vs BMI > or = 23.7 kg/m2, r = -0.693, p = 0.0183), lower HOMA cell function (HOMA cell function < 57.2, r = -0.514 vs HOMA cell function > or = 57.2, r = -0.773, p = 0.0091) and higher fasting glucose levels (fasting glucose < 102 mg/dL, r = -0.697 vs fasting glucose > or = 102 mg/dL, r = -0.59, p = 0.0735). The results of correlation analysis was not significant in diabetics with lower BMI. CONCLUSION: Limitation of validity of HOMAIR should be carefully considered in subjects with lower BMI and lower fasting insulin to glucose levels, such as lean type 2 diabetes with insulin secretory defects.

Can the Oral Glucose Tolerance Test (OGTT) done at Postpartum (PPT) 1 Wddk Substitute OGTT at PPT 6 Week OGTT at PPT 6 Week in Diagnosing Rersistent PPT Glucose Intolerance in the Patients with Gastrational Diagetes Melltus (GDM)?.: Yoo Lee Kim, Yong Wook Cho, Seok Won Park, Yun Kyung Cho, Hwa Young Lee, In Hyun Kim, Jong Gun Won, Hye Sun Jun, Ho Taek Lee, Seog Ki Lee, Sang Jong Lee; Korean Diabetes J. 2000;24(2):267-280. Published online January 1, 2001

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Abstract PDF: BACKGROUND
Although 75 g-OGTT at PPT 6 week is necessary to diagnose persistent PPT glucose intolerance (PPGI) in GDM patients, it 1s difficult to perform this test because many patients drop-out during the follow-up period. Thus we tested whether OGTT done at PPT 1 week can substitute OGTT at PPT 6 week in diagnosing PPGI in GDM patients. METHOD: In 370 GDM patients, 75 g-OGTT was performed at PPT 1 week and repeat OGTT was done in 196 patients at PPT 6 week. Results of OGTT were classified as normal glucose tolerance(NGT), impaired glucose tolerance(IGT), and diabetes mellitus (DM) according to National Diabetes Data Group(NDDG) criteria. Changes in glucose tolerance state between PPT 1 and 6 week were assessed, and the predictability of clinical characteristics for these changes were investigated by logistic regression analysis. RESULTS: Among 370 GDM patients who performed OGTT at PPT 1 week, 79.4% had NGT, 12.2% had IGT, and 8.4% had DM. 53% (196/370) of subjects repeated OGTT at PPT 6 week. In OGTT at PPT 6 week, 77.6% (152/196, 140/149 in NGT, 4/26 in IGT and 8/21 in DM) were in the same glucose tolerance state as at PPT 1 week. The glucose tolerance improved in 14.8% (29/196, 16/26 in IGT and 13/21 in DM) and deteriorated in 7,6% (15/196, 9/149 in NGT and 6/26 in IGT). 94%(140/149) of patients who had NGT at PPT 1 week had NGT at PPT b week and 48.9/o (23/47) of patients who had abnormal glucose tolerance at PPT 1 week had abnormal glucose tolerance at PPT 6 week. Mean fasting plasma glucose level on OGTT became lower at PPT 1 week than during pregnancy (4.6+/-0,8 vs 5.1+/-1.2mmol/L, p<0.05) and became higher at PPT 6 week than at PPT 1 week (5.4+/-1.1 vs 4.6+/-0.8 mmol/L, p<0.05). Mean plasma glucose level at 2 hour after glucose load was significantly lower at PPT 6 week than at PPT 1 week (7.2+/-2.7 vs 8.3+/-2.5 mmol/L). When the subjects were grouped into NGT, IGT, and DM according to glucose tolerance state at PPT 6 week, the NGT group already showed normal glucose tolerance at PPT 1 week. The IGT and DM group showed slightly lower glucose levels at PPT 1 week than during pregnancy but became high to the level during pregnancy at PPT 6 week. In the patients group showing deterioration in glucose tolerance state between PPT 1 and 6 week, prevalence of insulin treatment was higher (63.4% vs 9.4, 20.7%), the gestational age at diagnosis of GDM were lower (25.0+/-6.2 week vs 29.8+/-3.3, 29.9+/-4,8 waek), and prepregnant weight was higher (113.4+/-21.2% vs 102.5+/-12.4, 102.4+/-14.6%) than those in the patients groups showing no change and improvement in glucose tolerance state, Weight gain until diagnosis of GDM during pregnancy(5.7+/-4.4kg vs 9.4+/-3.4kg) and weight change between prepregnancy and PPT 5 week(-1,3+/-3.5kg vs 1.5+/-29kg) was smaller in the deterioration group than those in the no change group. Logistic regression analysis performed using improvement and deterioration of glucose tolerance state between PPT 1 and 6 week as an outcome of interest revealed that an earlier diagnosis of GDM and a smaller weight at PPT 6 week than prepregnant weight were independent predictors for deterioration of glucose tolerance between PPT 1 and 6 week. In conclusion, OGTT done at PPT 1 week can substitute OGTT at PPT 6 week in a large subgroup of GDM patients who has NGT at PPT 1 week without any risk factors for deterioration in glucose tolerance.

Antepartum Characteristics Predicting Persistent Postpartum Glucose lntolerance in the Patients with Gestational Diabetes Mellitus (GDM).: Yoo Lee Kim, Yong Wook Cho, Seok Won Park, Seog Ki Lee, In Sup Ahn, Byung Wook Na, Jun Lee, Yun Kyung Cho, Hwa Young Lee, Sang Jong Lee; Korean Diabetes J. 2000;24(1):46-59. Published online January 1, 2001

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Abstract PDF: BACKGROUND
The aim of this study is to investigate the prevalence of persistent postpartum glucose intolerance and to examine antepartum clinical characteri-stics for their predictability of persistent postpartum glucose intolerance in the patients with GDM. METHODS: In 211 GDM patients who showed more than two abnormal glucose values of O'Sullivan and Mahan's criteria on 100g-oral glucose tolerance test (OGTT), 75g-OGTT were performed at 6 weeks postpartum. The incidence of postpartum normal glucose tolerance (NGT), impaired glucose tolerance (IGT), and diabetes mellitus (DM) were investigated and antepartum ciinical parameters were compared among the three groups, Predictability of antepartum clinical characteristics for postpartum IGT and DM were also investigated by logistic regression analysis. RESULTS: When we grouped the patients into postpartum NGT, IGT, DM according to the results of 75g-OGTT performed 6 weeks postpartum, The incidence were 81,5% of subjects had NGT, 9.0% had IGT, and 9.5% had DM. Plasma glucose levels and GAUC on antepartum 100 g-OGTT(NGT: 1660+/-159, IGT: 1948+/-730, DM: 2538+/-629mmol/L ' min), and proportion of patients receiving insulin therapy increased progressively and significantly in association with worsening postpartum glucose tolerance. Frequency of positive family history of DM in qroups with IGT and DM (63,2% & 80.0%) were significantly higher than that in group with NGT(37,2%). Weight gain before diagnosis of GDM in groups with IGT and DM(6.7+/-3.9kg & 6.8+/-4.1 kg) were significantly smaller than that of group with NGT(9.5+/-3,5kg), Gestational age at diagnosis of GDM in group with DM(25.8+/-5.4 weeks) was significantly shorter than that in group with NGT(30.0+/-3,3 weeks), Proportion of subjects diagnosed earlier than 24 weeks of gestation were significantly higher in groups with IGT (15.8%) and DM (25.0%) than in group with NGT (1.2%). Proportions of subjects delivered heavier infants, > or =4 kg,were significantly higher in the DM group (40.0%) than in the NGT group (9.3%). In the patients having fasting plasma glucose levels hlgher than 5.8 mmol/L on antepartum 100g-OGTT, the prevalence of persistent glucose intolerance was significantly higher than in the patients FPG level lower than 5.8 mmol/L (61.9% vs 7.7%), Logistic regression analysis were performed using IGT and DM as the outcome of interest. The GAUC on antepartum 100g-OGTT, family history of DM, and the gestational age at diagnosis of GDM were independent predictors for both postpartum DM and postpartum IGT. CONCLUSION: The prevalence of persistent postpartum glucose intolerance in GDM patients were 18.5% and the most important independent predictor for persistent postpartum glucose intolerance was the degree of severity in glucose intolerance during pregnancy.

The Comparison between Doppler Ultrasonography and Digital Infrared Thermographic Imaging (DITI) in Detecting the Diabetic Peripheral Angiopathy.: Yoon Sang Choi, Hyun Ju Um, Seung Oh Song, Si Yong Kim, Byong Ik Kim, Young Uk Lee, Seok Won Park, Yoo Lee Kim, Hwa Young Lee, Yong Wook Cho, Sang Jong Lee; Korean Diabetes J. 1999;23(5):686-694. Published online January 1, 2001

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Abstract PDF: BACKGROUND
The frequency of nontraumatic lower extremities amputation has significantly increased in patients with type 2 diabetes (DM). Digital Infrared Thermographic (DITI) has been used to demonstrate the skin temperature and its change. mellitus Imaging regional Doppler ultrasonography was developed to show excellent images of superficial arteries. In this study, we observed the relationship between DITI and doppler ultrasonography for detection or evaluation of diabetic peripheral angiopathy. METHODS: 71 patients with type 2 DM were divided to groups with and without peripheral arterial obliteration (PAO) by ankle pressure index (API). For all patients, doppler ultrasonography of lower extremities was performed in measuring inner diameter, wall thickness and calcification of femoral, popliteal and dorsalis pedis artery. DITI was done also. We analized the result of doppler ultrasono-graphy and DITI findings. RESULT: 1) In clinical characteristics of patients between nonperipheral arterial obliteration (NPAO) and PAO : there was no significant differences between two groups with respect to age, sex, smoking, BMI (body mass index), FPG (fasting plasma glucose)/2HPG (2 hour plasma glucose), HbA(1C), serum lipid profile and/or the frequency of NPDR (nonproliferative diabetic retinopathy). However, the number of patients with hypertension and 24hr urine total protein amount were significantly increased in PAO group. 2) The results of doppler ultrasonographic imaging of lower extremities: In PAO group, inner diameters of common femoral artery and dorsalis pedis artery were significantly narrower than in those of NPAO group. However, no difference was detected in respect to vessel wall thickness. The numbers of calcified vessel wall have significantly increased in all vessels in PAO group 3) The results of DITI patterns of big toes after cold stimulus: (1) In 49 patients with NPAO: 11 showed as normal, 14 an increased, 15 a decreased, and 9 flat patterns, respectively. (2) All of 22 patients with PAO showed abnormal patterns. Among them, 2 showed a decreased, but 20 a flat pattern. 4) The comparison between the results of doppler ultrasonography and DITI: In all groups, inner diameter of common femoral artery, which was measured by doppler ultrasonography, were narrow in the flat pattern. Also, the number of calcified vessel walls in common femoral artery and dorsalis pedis artery increased more in the same patterns. No significant difference of vessel wall thickness was found between both groups. CONCLUSION : Vasoreaction of lower extremities after cold stimulus was mainly related to PAO of the common femoral artery and dorsalis pedis artery. DITI is a useful method used in detecting the early state of artherosclerosis. As a result, it can be employed in early prevention and treatment of diabetic angiopathy. If DITI is combined with doppler ultrasonography, we can practice more precise diagnosis and follow-up in diabetic peripheral angiopathy.

Floow-up Study of Clinical and Immunogenetic Chracteristics and Basal C-peptidein Korea Young Age Onset Diabetic Patients.: Hyun Chul Lee, Duk Hi Kim, Jae Hyun Nam, Chul Woo Ahn, Seong Kil Lim, Kap Bum Huh, Soo Yeon Nam, Seok Won Park, Young Deuk Song, Hyun Soo Kim, Jin Wook Kweon, Kyung Hee Chang, Kyung Rae Kim; Korean Diabetes J. 1999;23(3):288-298. Published online January 1, 2001

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Abstract PDF: BACKGROUND
This study was undertaken to observe the changes of basal C-peptide level and to compare the clinical and immunogenetic characteristics in newly dignosed young age-onset diabetics in Korea. We studied predictors effecting the change of insulin secretory capacity in these patients. METHODS: 82 newly diagnosed young diabetic patients (mean age; 23.0+7.1, M:F=46:36) were divided into 3 groups according to the initial fasting serum C-peptide level (Classification I, group 1; C-peptide < 0.6 ng/mL, group 2; 0.6 ng/mL C-peptide <1.2 ng/mL, and group 3; 1.2 ng/mL C-peptide) and reclassified by the follow-up (mean follow-up; 3.7 year) fasting serum C-peptide level. RESULTS: According to the initial fasting serum C-peptide level, 17.1% (14/82) of the patients were classified as group 1, 35.4% (29/82) as group 2, and 47.5%(39/82) as group 3. In group 3, body mass index (BMI, p<0.01) and maximal BMI (p<0.01) at onset, family history of diabetes (p=0.01) and stimulated C-peptide increment were significantly higher than those in group 1 and 2. Presence of urine ketone (p<0.01), history of diabetic keto- acidosis (p<0.01), and frequency of insulin therapy at diagnosis (p<0.01) were significantly lower than those in group 1 and 2. No significant differences in onset age, sex, weight loss at onset, HbA1c, anti GAD antibody and HLA-DR were found among the 3 groups. After certain follow-up periods, 37.8% (31/82) of the patients were reclassified as group 1, 24.4% (20/82) as group 2, and 37.8% (31/82) as group 3 according to the follow-up fasting serum C-peptide level(classification II). All of the patients in group 1 in classification I were reclassified as group 1 in classification II. In group 2, 44.8% were reclassified as group 1 and 17.3% were reclassified in group 3. In group 3, 15.4% (6/39) of patients showed a significant decrease in insulin secretory capacity and were reclassified as type I diabetes, and their predictors for decreased insulin secretory capacity were low BMI at onset, low slimulated C-peptide increment, and antiGAD antibody. CONCLUSION: Our study showed that classification of newly diagnosed young diabetics by fasting C-peptide level is not always easy. Therefore follow-up measurement of C-peptide and consideration of clinical characteristics are needed in discriminating the type of diabetes in these groups of diabetics in Korea.

Associations of Carotid Intinma-Media Thickness Measured by High Resolution B-mode Ultrasonography and Atherosclerotic Risk Factors in NIDDM Patients.: Hyun Chul Lee, Jae Hyun Nam, Seong Kil Lim, Kap Bum Huh, Kyeong Rae Kim, Soo Yeon Nam, Seok Won Park, Churl Woo Ahn, Young Deuk Song, Dae Jung Kim, Young Guk Ko; Korean Diabetes J. 1999;23(3):234-242. Published online January 1, 2001

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Abstract PDF: BACKGROUND
Atherosclerosis is more prevalent in diabetic patients, severe and wide spread than in non-diabetic subjects and clinically evident as macrovascular diseases such as coronary, cerebro- vascular and peripheral arterial diseases which are important causes of frequent morbidity and premature mortality. But atherosclerotic vascular lesions are not easily detectable, before they advanced and cause symptoms. Measurement of carotid Intima-Media thickness(IMT) by high- resolution B-mode ultrasonography is a useful, non-invasive method to detect early atherosclerotic vascular changes. In this study, we investigated associations of IMT with cardiovascular risk factors. METHODS: High-resolution B-mode ultrasonography was performed in 63 non-insulin-dependent diabetic patients in order to determine maximal and mean carotid IMT. Blood pressure, glucose, HbA total cholesterol, HDL cholesterol and triglyceride levels were measured on a regular basis in the last 12 months before the carotid ultrasonography. The mean and last values at the time of the carotid ultrasonography were analyzed in relationship to the IMT. RESULTS: Carotid IMT was increased in NIDDM patients with male sex, smoking habit and hypertension. Systolic blood pressure (r=0.252, p=0.050) and LDL cholesterol levels (r=0.273, p=0.031) at the time of carotid ultrasonography showed a correlation with the IMT. Mean triglyceride (r=0.368, p=0.018) and HbA1c>, levels (r=0.288, p=0.045) of the last 12 months were correlated with the IMT. CONCLUSION: Increased carotid IMT was associated with male sex, smoking, hypertension, systolic blood pressure, LDL cholesterol, mean HbA, and triglyceride levels.

Risk Factors for Peripheral Arterial Disease as Screened by Plethysmography in Patients with NIDDM.: Hyuk Jae Chang, Dae Jung Kim, Byoung Joo Choi, Young Guk Ko, Churl Woo Ahn, Dong Ryeol Ryu, Yong Seok Yun, Seol Hye Han, Jae Hyun Nam, Seok Won Park, Young Duk Song, Sung Kil Lim, Kyung Rae Kim, Won Heum Shim, Hyun Chul Lee, Kap Bum Huh; Korean Diabetes J. 1999;23(2):172-181. Published online January 1, 2001

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Abstract PDF: BACKGROUND
Peripheral arterial disease (PAD) is one of the clinical manifestations of the atherosclerotic disease process. Early onset and rapid progression of PAD in diabetic patients has been well documented. PAD in diabetic patients has also been associated with an increased risk for total and cardiovascular mortality. Plethysmography is a noninvasive test to screen for the presence of PAD. Thus the aim of this study is to assess the risk factors for PAD screened by plethysmography in NII)DM patients. METHODS: A total of 289 NIDDM patients who undlerwent plethysmography were entered into our annlysis. Clinical characteristics of 38 patients with an ankle-brachial index of <0.9 (group B) were conapared with those of 231 patients with an ankle-brachial index of >1.0 (group A). RESULTS: Abnormalities in plethysmographic findings were found in 45.7% of diabetic patients. Age, duration of diabetes, hypertension, smoking, previous history of vascular diseases, HDL cholesterol, TC/HDL, and LDL/HDL appeared to be factors significantly related to PAD. Fasting sugar, HbAlc, total cholesterol, LDL cholestero1, trigly ceride, fibrinogen, lipoprotein(a), and waist-hip ratio were not significantly different between the two groups. The multiple logistic regression analysis showed the signficant contribution of the previous history of vascular disease (p=0.0028) and age (p-0.0115) to PAD in diabetic patients. CONCLUSION: The prevalence of PAD defined by plethysmography in our subjects was 45.7% higher than expected, suggests that efforts for early detection and prevention of PAD should be emphasized in diabetic patients.

Pathogenetic Heterogeneity of Type 2 Diabetes Mellitus in Korea.: Seok Won Park, Yong Seok Yun, Young Duk Song, Hyun Chul Lee, Kap Bum Huh; Korean Diabetes J. 1999;23(1):62-69. Published online January 1, 2001

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Abstract PDF: BACKGROUND
Insulin resistance and insulin sec- retory dysfunction are considered as pathogenetic meehanisms leading to type 2 diabetes mellitus. In Korea, clinical features of type 2 diabetes are quite different from those of western countries. There are many non-obese patients and some even experienced considerable weight 1oss around the onset of diabetes mellitus. We investigated the insulin secretory function and in vivo insulin sensitivity in Korean patients with type 2 diabetes. METHODS: 38 patients with type 2 diabetes mellitus (age; 47.3+/-9.1 yrs) and 30 control subjects (age; 25.72.7 yrs) were included in this study. Type 2 diabetic subjects were further divided into obese (BMI >25, n=13) and non-obese (BMI<25, n=25) groups. Insulin secretory responses to the 75g aal gluxse loading and euglycemic hyperinsulinemic clamp test were performed on all subjects. RESULTS: Type 2 diabetic subjects had significantly lower serum insulin levels at 30 min of OGTT, regardless of their obesity, compared to the control subjects. Mean glucose disposal rates (M-values) were decreased by 36% in non-obese type 2 diabetic subjects and 58% in obese type 2 diahetic subjects compared to the control subjects. But, about half (12/25) of non-obese type 2 diabetic subjects and 30% (4/13) of obese type 2 diabetic subjects had normal insulin sensitivity, defined by 95% confidence interval of control subjects. Insulin sensitivity index (M-value) was correlated with BMI, WHR, fasting insulin, and HDL-cholesterol concentrations in type 2 diabetic subjects. CONCLUSION: In Korean type 2 diabetic subjects, impairment of early-phase insulin secretion may be an universal finding, but insulin resistance is observed in about 60% of subjects. This result suggest that there is pathogenetic heterogeneity of type 2 diabetes rnellitus in Korea.

Insulin Resistance and Related Factors in the Healthy Young Men.: Seok Won Park, Yoon Sok Chung, Yong Seok Yun, Bong Soo Cha, Young Duk Song, Hyun Chul Lee, Kap Bum Huh; Korean Diabetes J. 1998;22(4):504-512. Published online January 1, 2001

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Abstract PDF: BACKGROUND
Resistance to insulin-stimulated glucose uptake is present in the majority of patients with obesity, glucose intolerance, hypertension, dyslipidemia, and coronary artery disease. It is known that values for insulin-stimulated glucose uptake(insulin sensitivity) vary widely within individuals with normal glucose tolerance. We investigated the variations in insulin sensitivity and related factors in the nonobese healthy young men. METHODS: Insulin sensitivity was considered as whole body insulin-stimulated glucose uptake rate(M), determined by euglycemic hyperinsulinemic clamp technique in 44 non-obese healthy young men with normal glucose tolerance. Plasma glucose, insulin, and C-peptide concentrations after a standard oral glucose tolerance test and total cholesterol, triglyceride, and HDL-cholesterol levels were measured after 12-hours fasting. The subjects were divided into four quartiles based on the insulin sensitivity (M) and their clinical and biochemical characteristics were compared. RESULTS: Glucose disposal rates (M-values) were ranged from 4.14 to 11.06 mg/kg/min and distributed normally. The plasma glucose levels were not different between quartiles but plasma insulin levels of quartile 1 were significantly higher than the other three quartiles during oral glucose tolerance test. There was a curvilinear relationship between insulin sensitivity and acute insulin response (Ins[o-30]) to oral glucose challenge. There were negative cnrrelations between insulin sensitivity and BMI, percent ideal body weight, WHR, body fat content, fasting insulin level, insulin response area during OGTT, and fasting serum triglyceride level. HDL-cholesterol concentration was positively correlated with insulin sensitivity. In multiple linear regression analysis, body fat content, fasting insulin, and HDL-cholesterol were independent variables, which were related to the insulin sensitivity. CONCLUSION: There were considerable variations in insulin sensitivity in the nonobese healthy young men with normal glucose tolerance and the related independent factors were body fat content, fasting insulin, and HDL-cholesterol cancentrations.

Insulin Gene Polymorphisms in non-insulin-dependent Diabetes Mellitus ( NIDDM ) in Korean.: Jin Suk Kwon, Seok Won Park, Bong Soo Cha, Young Duk Song, Churl Woo Ahn, Keun Soo Jang, Soo Jin Kim, Seung Kil Lim, Kyung Rae Kim, Hyun Chul Lee, Kap Bum Huh; Korean Diabetes J. 1998;22(4):442-449. Published online January 1, 2001

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Abstract PDF: BACKGROUND
Many epidemiologic and family studies indicated stronger influence of genetic factors in NiDDM compared to IDDM, and there has been investigations to identify the susceptibility genes but without definite results. Insulin gene with its regulator region has been considered as a possible candidate gene of NIDDM because of relative deficiency in insulin secretion. So, we investigated the possible relationship between insulin gene polymorphisms and NIDDM in Korean. METHODS: we investigated -23 Hph I and +1,127 Pst I restriction site on insulin gene region in 67 NIDDM patients and 33 healthy controls by polymerase chain reaction-restriction fragment length polymorphism(PCR-RFLP) method, and compared the allelic frequencies. We also compared the insulin secretory capacity, degree of blood glucose control, and family history of diabetes mellitus according to insulin gene polymorphism. RESULTS: l. Insulin gene polymorphism on -23 Hph I restriction site or +1,127 Pst I restrietion site does not confer susceptibility to NIDDM in Korea, 2. No differences were observed in onset age, family history of diabetes mellitus, insulin secretory capacity, and degree of blood glucose control, according to insulin gene polymorphism. CONCLUSION: Insulin gene polymorphism on Hph I site and Pst I site probably does not play an important role in the pathogenesis of NIDDM in Korean population.

Short Insulin Tolerance Test(SITT) for the Determination of in vivo Insulin Sensitivity-A Comparison with Euglycemic Clamp Test.: Seok Won Park, Yong Seok Yun, Churl Woo Ahn, Jae Hyun Nam, Suk Ho Kwon, Min Kyung Song, Seol Hye Han, Bong Soo Cha, Young Duk Son, Hyun Chul Lee, Kap Bum Huh; Korean Diabetes J. 1998;22(2):199-208. Published online January 1, 2001

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Abstract PDF: BACKGROUND
The euglycemic hyperinsulinemic clamp technique is currently regarded as gold standard for measuring insulin sensitivity, but it requires sophisticated equipment and highly trained personnel. We investigated the reliability of short insulin tolerance test as a simple tesl to measure in vivo insulin sensitivity. METHODS: Short insulin tolerance test(SITT) and euglyeemic hyperinsulinemic clamp test were performed at random order in 14 healthy subjects and 10 abnormal glucose tolerant subjects. The plasma glucose disappearance rate(kitt: %/min) after iv injection of regular insulin(0.1U/kg) was determinecl and compared to insulin sensitivitv indices(M, M/I) of euglycemic hyperinsulinemic clamp test. RESULTS: The mean Kitt value of healthy subjects was 3.50+0.75%/min and that of subjects with abnormal glucose tolerance was 2.56+0.56%/min. Changing sampling time from 15 min to 18~21 min and sampling interval from 3 min to 1.5 min had no influence on Kitt value. Kitt values were reproducible in six subjects, with a CV of 8.8+2.0%. There was a highly significant correlations between the Kitt value derived from SITT and M or M/I derived from euglycemic hyperinsulinemic clamp test. There were no significant adverse effects including hypoglycemic symptom while performing SITT. CONCLUSION: SITT is simple, safe, rapid to perform, and provides reliable index of in vivo insulin sensitivity. It seems particularly suitable for studies involving large series of subjects or including repeated evaluation of insulin sensitivity.

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