“…[4][5][6][7][8] Although efforts to measure performance represent welcome developments, the focus on the hospital standardized mortality ratio, especially when the ratio is derived solely from administrative data, goes against the results of decades of investigation. 9,10 Proposed strategies to measure and improve hospital performance efforts have included the establishment of national patient safety agencies, 11 mandatory accreditation, 12 financial incentives 13 and publicly reported performance measures. 14 Performance measures have targeted structure (e.g., patient volumes and recommended staffing patterns for intensive care 15 ), process (e.g., report cards on adherence to recommended aspects of care for patients with acute myocardial infarction and pneumonia 16 ) and outcomes.…”