The Relationship between beta-cell Function and Nutrient Intakes in Korean Adult: Using 4th Korea National Health and Nutrition Examination Survey 2009 / 대한지역사회영양학회지

The purpose of this study was to evaluate pancreatic beta-cell function of Korean adult and to examine the associations between beta-cell function and nutrient intakes. Data were analyzed for 1,917 male and 2,885 female subjects older than 30 years using 'The Forth Korean National Health and Nutrition Survey in 2009'. We calculated HOMA beta-cell (The homeostasis model assessment of beta-cell function) using fasting glucose and fasting insulin for assessing beta-cell function. Subjects were divided into HHG (High HOMA beta-cell Group) or LHG (Low HOMA beta-cell Group) according to median of HOMA beta-cell, and then nutrient intakes were compared between two groups. In the entire study population, HHG showed lower percent of carbohydrate intakes (p or = 23 kg/m2 (over-weight and obese). Significant differences of some nutrients intakes and correlations with HOMA beta-cell were observed only in under- and normal weight subjects, but not in over-weight and obese subjects. In conclusion, high carbohydrate, lower fat and lower vitamin intakes may be related with pancreatic beta-cell dysfunction in under- and normal-weight Korean.

Insulin Sensitivity and Insulin Secretion Determined by Homeostasis Model Assessment and Future Risk of Diabetes Mellitus in Korean Men / 당뇨병

BACKGROUND: Insulin resistance and progressive pancreatic beta cell dysfunction have been identified as the two fundamental features in the type 2 diabetes. Homeostasis model assessment (HOMA), based on plasma levels of fasting glucose and insulin, has been widely validated and applied for quantifying insulin resistance and secretion. This study was performed to assess the predictive value of HOMA indices for future diabetes risk. METHODS: In 14,976 Korean men, in which medical check-up was performed both in 2002 and 2006 in a university hospital health promotion center in Seoul, Korea, prospective assessment for diabetes risk was assessed. At baseline, anthropometric measurements were done and fasting glucose, insulin, lipid profiles were measured. HOMA-insulin resistance (HOMA-IR) and beta cell function (HOMA beta-cell) were calculated from fasting glucose and insulin levels. RESULTS: After 4 years, 286 subjects (1.9%) were newly diagnosed as diabetes mellitus. These patients (mean age 40.3 years) were age-matched with 632 control subjects (mean age 39.8 years) and diabetes risk was assessed with HOMA indices. Among the parameters, body mass index, fasting glucose and HOMA beta-cell were the significant determinants for future diabetes risk. When the subjects were divided into two groups according to the baseline median values of HOMA-IR and HOMA beta-cell, and assessed jointly, those with the low HOMA beta-cell and high HOMA-IR showed the highest risk for future diabetes (RR 39.065, 95% CI 11.736~130.035, P < 0.01). The subjects with low baseline HOMA beta-cell showed higher RR for diabetes than those with high baseline HOMA-IR (4.413 vs. 3.379, P = 0.018, P = 0.051). CONCLUSION: High HOMA-IR and low HOMA beta-cell were associated with the highest risk for future diabetes in this prospective study of Korean male subjects. These data suggest the value of HOMA indices for diabetes risk in epidemiologic studies in Asian subjects.