, there is considerable interest in the use of bifrontal cerebral oximetry as a measure of brain perfusion.723 Two RCTs in CABG patients suggest that bifrontal cerebral oximetry may be helpful in predicting early perioperative cognitive decline, stroke, noncerebral complications, and ICU and hospital length of stay.709,710 A 2011 observational cohort (1178 CABG patients) suggested that a patient s preoperative re- sponse to breathing oxygen for 2 minutes (ScO2 50%) is an independent predictor of death at 30 days and 1 year after 5. CABG-Associated Morbidity and Mortality: Occurrence and Prevention Several comprehensive data registries for CABG have been developed in the United States, the largest being the STS Adult Cardiac Database. For 20 years, these registries have collected data on all aspects of the procedure.306,725,727 A detailed analysis of these data and their correlation to out- comes has facilitated the creation of risk-assessment models that estimate the rates at which various adverse events occur. On the basis of these models, risk-adjusted outcomes for hospitals and surgeons have been calculated and, in some instances, publicly reported. 5.1. Public Reporting of Cardiac Surgery Outcomes: Recommendation Class I 1. Public reporting of cardiac surgery outcomes should use risk-adjusted results based on clinical data.728 735 (Level of Evidence: B) See Online Data Supplement 31 for additional data on public reporting of cardiac surgery outcomes. 