This renewal of the Data Coordinating Center (DCC) for the Longitudinal Assessment of Bariatric Surgery (LABS) will continue to support a multi-center consortium that was created to facilitate coordinated clinical, epidemiological and behavioral research in bariatric surgery. The DCC developed the core database and provides logistical and scientific support in all aspects of study design, conduct, analysis, and administration. A supplement funds activities for ending data collection and management, archiving datasets, and completing statistical analyses.