Question (Aim) 2: To what extent do these bariatric procedures differ on improvements in diabetes risk at 1, 3, and 5 years? Among patients with diabetes, remission or "cure" of their disease (defined as HbA1c <6.5% off diabetes medications) has been cited as the most important outcome of bariatric surgery. Thus, we will examine the comparative effect of these procedures on rates of diabetes remission as well as relapse (recurrence). Secondary analyses will examine the comparative impact of the procedures on glycemic control independent of diabetes remission.