We randomized 531 (Men : Women, 421 : 110) subjects with IGT [mean age of 45.9 + 5.7 years and body mass index (BMI) of 25.8 + 3.5 kg/m2 into four groups. Group 1 was the control (CON), Group 2 was advised lifestyle modification (LSM), Group 3 was treated with metformin (MET) and Group 4 with LSM plus MET. Primary outcome measure was type 2 diabetes diagnosed by the WHO criteria.