To the Editor: The study of Hospital Compare quality performance measures by Drs Werner and Bradlow1 compared the mortality rates for Medicare patients cared for in hospitals classified as poor performing with the mortality rates of patients in high-performing hospitals; this was based on the performance measures that are used by the Joint Commission on Accreditation of Healthcare Organizations. The study found the differences in mortality to be very small and in some cases only marginally statistically significant.
Fierer J. Medicare’s Hospital Compare Performance Measures and Mortality Rates. JAMA. 2007;297(13):1430–1432. doi:10.1001/jama.297.13.1430-a
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