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Hyun Ha Chang  (Chang HH) 2 Articles
Homeostasis Model Assessment In Korean Type 2 Diabetes Patients.
Hyun Ha Chang, Jin Woo Kim, Mee Suk Rhu, Cheol Young Park, Seung Joon Oh, Jeong Taek Woo, Sung Woon Kim, Young Seol Kim, Young Kil Choi
Korean Diabetes J. 2002;26(4):296-305.   Published online August 1, 2002
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AbstractAbstract PDF
BACKGROUND
Both insulin resistance and decreased insulin secretion have been known to be defects causing type 2 diabetes. However, decreased insulin secretion rather than insulin resistance has been suggested to be a more important factor in development of type 2 diabetes in Korea. Thus, we undertook this study to evaluate insulin resistance and beta cell function in Korean type 2 diabetes patients. METHODS: Retrospectively, we applied HOMA model to 1,233 type 2 diabetes pateints (575 males and 658 females) and assessed HOMA(beta cell) function and HOMA(IR). RESULTS: The HOMA(IR) of Korean male was 2.6 (0.05~39.53) and that of Korean female was 3.1 (0.04~53.54), and the HOMA(beta cell) of male was 22.3 (0.2~873.8)%, and that of female was 30.6 (0.37~1738.3)%. There was no significant difference. There was no significant correlation between HOMA(IR) and age and duration of diabetes, but there was significant correlation between HOMA(beta cell) and BMI, 0 min, 30 min insulin level and 0 min C-peptide level in oGTT. In the group of high HOMA(IR) than lower HOMA(IR), HOMA(beta cell) have more strong correlation with age at dignosis, BMI, duration of diabetes, FBS, 0 min and 60 min insulin, 0 min C-peptide and 24 hour urine C-peptide. CONCLUSION: In comparison with HOMA Model of San Antonio Heart Study, the HOMA(beta cell) and HOMA(IR) of Korean were lower, so the HOMA(beta cell) and HOMA(IR) may be different between ethnic groups. And further prospective analysis for the evaluation of insulin resistance and insulin secretion defect with HOMA model should be done in Korean type 2 diabeties.
Gastric Dysfunction Assessed by Electrogastrography and the Acetaminophen Absorption Technique in Patients with Diabetic Neuropathy.
Hyun Ha Chang, Young Seol Kim, Sang Hwa Kim, Cheol Young Park, Seung Joon Oh, Jeong Taek Woo, In Myung Yang, Sung Woon Kim, Jin Woo Kim, Young Kil Choi
Korean Diabetes J. 2001;25(1):83-92.   Published online February 1, 2001
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AbstractAbstract PDF
BACKGROUND
In patients with diabetes mellitus, dysrhythmias of gastric myoelectrical activity are frequently associated with gastroparesis. Thus, we investigated the relationships between abnormal gastric myoelectrical activity and gastric emptying rate in patients with diabetes mellitus. METHODS: Using surface electrogastrography (Nippro, Tokyo, Japan) and acetaminophen absorption technique, we studied EGG and gastric emptying rate in 39 patients with diabetic neuropathy and 15 healthy volunteers as the control group. RESULTS: In two thirds of the patients with diabetes mellitus, fasting electrogastrography revealed instability of electrical control activity (ECA), as compared to 13% of the control. Postprandial amplitude and frequency increases in electrogastrography were observed in the control group. However, these postprandial responses were obtunded in patients with diabetes mellitus. In the assessment of gastric emptying rate, increases of plasma acetaminophen levels were delayed in obtunded postprandial responses of gastric myoelectrical activity. CONCLUSION: These results showed that the abnormal electrogastrography patterns were related to abnormal finding assessed acetaminophen absorption technique. Electrogastrography was thought to be a useful and non-invasive technique in assessing diabetic gastroparesis.

Diabetes Metab J : Diabetes & Metabolism Journal