Hayanga et al1 assessed mortality following colon resections as reported in the National Inpatient Survey, concluding that outcomes were worse at teaching hospitals (TH) compared with nonteaching hospitals (non-TH). Although this finding was statistically significant, review of the statistical methods used to arrive at this conclusion suggests that inadequate risk adjustment resulted in an erroneous conclusion.
Livingston EH. Teaching Hospital Status and Operative Mortality in the United States. Arch Surg. 2010;145(10):1025. doi:10.1001/archsurg.2010.209