Abstract
METHODS: The University Health Consortium Clinical Database (UHC) was queried for patients >18 years of age undergoing elective proctectomy with IPAA between 2009-2012. Hospital volumes were stratified into quartiles (high, medium, low, and lowest-volume) based on the number of cases performed per year. A summary measure of socioeconomic status (SES) using US Census American Community Survey 5-year estimates from 2011 for each US ZIP code was constructed. Patient travel characteristics were calculated using patient and hospital zip codes and Maptitude Geographic Information System software.
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