Infectious Surgical Complications are Not Dichotomous: Characterizing Discordance Between Administrative Data and Registry Data.

Objective: To characterize reasons for discordance between administrative data and registry data in the determination of postoperative infectious complications.

Background: Data regarding the occurrence of postoperative surgical complications are identified through either administrative or registry data. Rates of complications vary significantly between these two types of data; the reasons for this are not well-understood.