Methods: A cross sectional study of 131 subjects (over 45 years old without previous diabetes) were performed the test FPG, HbA1c and oral glucose tolerance tests, and then applied the diabetes risk scores including FINDRISC, IDRS, FRAMINGHAM OFFSPRING, THAI SCORE, DESIR and AUSDRISC for predicting the type 2 diabetes mellitus and screening to prediabetes and undiagnosed diabetes.