"America’s Best Hospitals” in the treatment of acute myocardial infarction.

BACKGROUND: The ranking of "America's Best Hospitals" by U.S. News & World Report for "Heart and Heart Surgery" is a popular hospital profiling system, but it is not known if hospitals ranked by the magazine vs nonranked hospitals have lower risk-standardized, 30-day mortality rates (RSMRs) for patients with acute myocardial infarction (AMI). METHODS: Using a hierarchical regression model based on 2003 Medicare administrative data, we calculated RSMRs for ranked and nonranked hospitals in the treatment of AMI. We identified ranked and nonranked hospitals with standardized mortality ratios (SMRs) significantly less than the mean expected for all hospitals in the study. RESULTS: We compared 13 662 patients in 50 ranked hospitals with 254 907 patients in 3813 nonranked hospitals. The RSMRs were lower in ranked vs nonranked hospitals (16.0% vs 17.9%, P