The TRIABETES - ARMMS-T2D Study: A Randomized Trial to Compare Surgical and Medical Treatments for Type 2 Diabetes

Type 2 Diabetes Mellitus, Obesity

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This research study is being performed to begin to determine the effectiveness of two dominant bariatric surgery procedures versus an intensive lifestyle intervention to induce weight loss in patients and promote improvements in Type 2 diabetes mellitus (T2DM) in moderately obese patients. T2DM is currently the 6th leading cause of mortality in the United States and is a major cause of kidney failure, blindness, amputations, heart attack, and other vascular and gastro-intestinal dysfunctions. Traditionally, treatments include intensive lifestyle modifications with or without glucose lowering agents. Neither treatment alone, or in combination, results in complete resolution of diabetes and its potential long-term complications. Bariatric surgery has been proven as an effective treatment to accomplish sustained and significant weight loss for those with severe obesity and has been shown to induce long-term remission of T2DM. However, despite enthusiasm for these potential treatment options, it is not clear whether diabetes is influenced by the type of surgery or by the amount of weight lost or if bariatric surgery is more effective than non-surgical weight loss induced by diet and physical activity in T2DM patients with moderate BMIs (30-40kg/m2; Class I and Class II obesity, or approximately 65-95 pounds overweight depending on your height). More well-controlled studies are needed to more completely inform health care decision making and clinical practice in this area. This research study aims to obtain preliminary information regarding the effectiveness of two major types of bariatric surgery, Laparoscopic Roux-en-Y Gastric Bypass and Laparoscopic Adjustable Gastric Banding versus an intensive lifestyle intervention to induce weight loss with diet and increased physical activity.

The Specific Aims of the first phase of the study are as follows: Aim 1. To determine the feasibility of performing a randomized trial comparing two major types of bariatric surgery, Laparoscopic Roux en Y Gastric Bypass (RNY) and Laparoscopic Adjustable Gastric Banding (GB) versus a lifestyle weight loss intervention (LWLI) induced by diet and increased physical activity in moderately obese patients (Class I and II obesity) with T2DM. We hypothesize that: 1) A randomized design with both surgical and non-surgical arms will be both feasible and acceptable to participants and to providers 2) There will be no difference in retention rates between the LWLI and surgical arms (RNY, GB) of the study and it will provide estimates of overall retention for future studies. Aim 2. To obtain preliminary information regarding the effectiveness of two dominant bariatric surgery procedures versus an intensive lifestyle intervention to induce weight loss with diet and increased physical activity. We hypothesize that: 1) RNY will be superior to GB and LWLI in weight lost in 12 months. Aim 3. To explore the feasibility, methods for, and implementation of a range of early outcome measures including; resolution of diabetes, glucose control, medication usage, insulin resistance, beta cell function, body composition, objective measures of physical activity, and several psychosocial measures. We hypothesize that: 1) Participants will be willing to undergo a range of early outcome testing measures to assess metabolic change, body composition alterations, objective physical activity, and psychosocial factors. 2) Measures of T2DM improvement including an intravenous glucose tolerance test (IVGTT) will be feasible in a subset of participants in each study arm and RNY will be superior to both GB and LWLI for the clinical and metabolic improvement of T2DM. 3) The LWLI group will show improvements in physical activity compared to RNY and GB.

United States