مقايسه‌ي بروز ديابت در تعريف‌هاي متفاوت قند خون ناشتالي مختل (مطالعه قند و ليپيد تهران‌)

Comparison Between Diabetes Incidence using Different Cut Points of IFG: Tehran Lipid Glucose Study (TLGS)

Introduction: In 2003, the American diabetes Association (ADA) recommended that the definition for a cut off of impaired fasting glucose (IFG) should be changed to 100-125 mg/dl This study has examined the effect of different cut points for IFG on diabetes incidence in Tehranʹs urban population. Material and methods: A total of 4929 (non-diabetic adults), aged 20-86 years, participants of the Tehran Lipid Glucose Study, were followed for diabetes incidence (based on FBS and glucose tolerance tests) for 3.5 years and were divided into various groups, normoglycemia < 100, original IFG 110-125, added IFG 100-110 and new IFG100-125 mg/dL. Odds ratio for diabetic incidence after adjustment for confounding factors with logistic regression model was measured. Results: The mean ages were 42.9±13.7 (minimum 20 & maximum 86 years old); 59.1% of participants were female (n; 2916). Prevalences of original IFG, added IFG and new IFG were 3.7% (n;183), 11.8% (n; 584), 15,5% (n; 767) respectively. At the end of study, 188 cases (3.8%) were diabetic. Incidence of diabetes in the normoglycemia, original IFG, added IFG and new IFG groups were 1.8% (n; 76), 26_2% (n; 48),11% {ne 64), and 14.6% [ne 112) respectively, Odds ratios for diabetes incidence after adjustment for age/sex and confounding factors compared with normglycemia, diabetes incidence were 11.4 (7,4-17.6), 4.7 (3.3-6.8), 6,3 (4.5-8.5) for original IFG. added IFG, and new IFG respectively. Conclusion: The new IFG definition does not appear to have enhanced ability to predict diabetes incidence compared to the originallFG definition.