This study was aimed to achieve of long-term weight loss in T2DM patients by use of comprehensive lifestyle changes program, providing patients with structured diet, exercise plan, group behavioral support and group education. Additionally the study was designed to establish reduction of the body weight leads to the improvement of glycemic and lipid metabolism, and also reducing blood pressure level. The study was also directed to show that lifestyle changes program in T2DM patients can lead to decreasing of hospitalization rate and healthcare consumption. In order to demonstrate a change from standard of care, data were to be collected from a parallel cohort from the same centers.