• Deborah S Keller, Kyle G Cologne, Anthony J Senagore, and Eric M Haas.
• Colorectal Surgical Associates, 7900 Fannin, Suite 2700, Houston, TX, 77054, USA; Division of Colon and Rectal Surgery, Houston Methodist Hospital, Houston, TX 77030, USA. Electronic address: debby_keller@hotmail.com.
• Am. J. Surg. 2016 Sep 1; 212 (3): 433-9.

BackgroundThe American College of Surgeons Surgical Risk Calculator was developed to improve risk stratification and surgical quality but has not been studied at the institutional level for specific disease states, like ulcerative colitis (UC).MethodsUC patients undergoing colorectal resection had predicted risk calculator data compared with actual outcomes for length of stay (LOS), complications, reoperation, and death. Main outcome measures were the difference in actual vs predicted outcomes.ResultsSeventy patients were evaluated. The actual and predicted mean LOS was identical, but not representative of the actual LOS picture, which had 10 LOS outliers (14.3%). The actual incidence of any complication (P < .001) and major complications (P < .001) was higher than predicted. The most common complications actually encountered-intrabdominal abscess (14.3%), postoperative ileus (7.2%), and anastomotic leak (5.7%), were not even calculated by the tool.ConclusionsFor UC, the calculator poorly evaluates relevant risks, complications, and is greatly impacted by outliers. These limitations caution use for surgical quality reporting and determining specific patient outcomes, at least in UC.Copyright © 2016 Elsevier Inc. All rights reserved.

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