Regional/national databases such as NSQIP, VSGNE, VQI, NIS, and Medicare are routinely used to perform retrospective analysis of vascular surgery outcomes. However, baseline differences in the patient population represented in each database can lead to variable outcomes and preclude generalizability of the results. These differences have not been systematically studied. The aims of these studies are to compare differences in baseline characteristics and outcomes for various vascular pathology across different types of large databases. Analyses include defining differences in baseline characteristics and performing risk-adjusted analysis on outcomes, including survival analysis if appropriate. Depending on time, effort, and level of comfort with statistics, students can become first authors and conference presenters.