Longitudinal Assessment of Bariatric Surgery (LABS) consortium was established in 2003 and was conceived to address important issues in bariatric surgery and metabolism in the obese and morbidly obese. LABS explores relationships of patient characteristics, clinical conditions, serologic and genetic markers, and clinical, psychosocial and health economic outcomes. The primary achievements of LABS have been to establish a research consortium and its infrastructure; define the domains of exploration, specific research questions and an effective study design to efficiently address those questions;identify appropriate metrics;design and implement a web-based data collection system and an extensive database;complete a cohort of over 5000 participants to study the short-term safety of bariatric surgery;enroll over 2000 people into a person cohort intended to be the focus of longer-term follow-up to address safety and efficacy of bariatric surgery;and implement 2 sub studies focusing on the mechanisms of diabetes resolution and more in-depth psychiatric and quality of life data, respectively, than in the full cohort. During this proposed continuation of LABS we will build on the rigorous research infrastructure across 9 clinical sites at the 6 Clinical Centers LABS investigators will address scientifically important Research protocols were developed and instituted to include a 30 day outcomes (safety, LABS-1) study of approximately 5,000 participants and a smaller cohort of 2,400 participants to conduct a detailed study of the longitudinal effects of bariatric surgery. LABS-3 diabetes is a sub-study of mechanisms of weight loss and impact on type 2 diabetes in gastric bypass patients. This proposal is the OHSU response to the limited competition RFA issued by the NIDDK soliciting cooperative agreement applications from investigators currently participating in the LABS consortium to study bariatric surgery and its role in the understanding of obesity and its complications for an additional five years. An extension to LABS will evaluate emerging effects of surgery and effects that change overtime.

Public Health Relevance

More than 5% of adults in the US meet the weight criteria for bariatric surgery but less that 2% of the eligible patients undergo this therapy per year. Research to define the benefits and risks is necessary to inform the question regarding the extent to which bariatric surgery should be done in eligible patients.

National Institute of Health (NIH)
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Research Project--Cooperative Agreements (U01)
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Special Emphasis Panel (ZDK1-GRB-6 (M1))
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Horlick, Mary
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Oregon Health and Science University
Schools of Medicine
United States
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Purnell, Jonathan Q; Selzer, Faith; Smith, Mark D et al. (2014) Metabolic syndrome prevalence and associations in a bariatric surgery cohort from the Longitudinal Assessment of Bariatric Surgery-2 study. Metab Syndr Relat Disord 12:86-94
Mitchell, James E; King, Wendy C; Chen, Jia-Yuh et al. (2014) Course of depressive symptoms and treatment in the longitudinal assessment of bariatric surgery (LABS-2) study. Obesity (Silver Spring) 22:1799-806
Kleiner, David E; Berk, Paul D; Hsu, Jesse Y et al. (2014) Hepatic pathology among patients without known liver disease undergoing bariatric surgery: observations and a perspective from the longitudinal assessment of bariatric surgery (LABS) study. Semin Liver Dis 34:98-107
Christian, Nicholas J; King, Wendy C; Yanovski, Susan Z et al. (2013) Validity of self-reported weights following bariatric surgery. JAMA 310:2454-6
King, Wendy C; Kalarchian, Melissa A; Steffen, Kristine J et al. (2013) Associations between physical activity and mental health among bariatric surgical candidates. J Psychosom Res 74:161-9
Gourash, William F; Ebel, Faith; Lancaster, Kathy et al. (2013) Longitudinal Assessment of Bariatric Surgery (LABS): retention strategy and results at 24 months. Surg Obes Relat Dis 9:514-9
Khan, Akram; King, Wendy C; Patterson, Emma J et al. (2013) Assessment of obstructive sleep apnea in adults undergoing bariatric surgery in the longitudinal assessment of bariatric surgery-2 (LABS-2) study. J Clin Sleep Med 9:21-9
Courcoulas, Anita P; Christian, Nicholas J; Belle, Steven H et al. (2013) Weight change and health outcomes at 3 years after bariatric surgery among individuals with severe obesity. JAMA 310:2416-25
King, Wendy C; Engel, Scott G; Elder, Katherine A et al. (2012) Walking capacity of bariatric surgery candidates. Surg Obes Relat Dis 8:48-59
King, Wendy C; Li, Jia; Leishear, Kira et al. (2011) Determining activity monitor wear time: an influential decision rule. J Phys Act Health 8:566-80

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