Unique risks for mortality in patients with end-stage renal disease undergoing nonemergent colorectal surgery

BackgroundThe aim of this study was to identify unique risk factors for mortality in patients with end-stage renal disease undergoing nonemergent colorectal surgery.MethodsA multivariate logistic regression model predicting 30-day mortality was constructed for patients with end-stage renal disease undergoing nonemergent colorectal procedures. Data were obtained from the National Surgical Quality Improvement Program (2005–2010).ResultsAmong the 394 patients analyzed, those with serum creatinine levels >7.5 mg/dL had .07 times the adjusted mortality risk of those with levels <3.5 mg/dL. For colorectal surgery patients, the average serum creatinine level was 5.52 ± 2.6 mg/dL, and mortality was 13% (n = 50).ConclusionsHigh serum creatinine was associated with a lower risk for mortality in patients with end-stage renal disease, even though creatinine is often considered a risk factor for surgery. These results show how variables from a patient-centered subpopulation can differ in meaning from the general population.