Perioperative risk factors impact outcomes in emergency versus non-emergency surgery differently - Time to separate our national risk-adjustment models?.

Background: Emergency surgery (ES) is acknowledged to be riskier than Non-Emergency Surgery (NES). Yet, little is known about the relative impact of individual perioperative risk factors on 30-day outcomes in ES vs. NES. Methods: Using the 2011-2012 ACS-NSQIP nationwide database, the 20 most common ES procedures were identified by CPT code. CPT codes with

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