• Medical care · Jun 2003

    Comparative Study

    The effect of publicly reporting hospital performance on market share and risk-adjusted mortality at high-mortality hospitals.

    • David W Baker, Doug Einstadter, Charles Thomas, Scott Husak, Nahida H Gordon, and Randall D Cebul.
    • Center for Health Care Research and Policy, Department of Medicine, Case Western Reserve University, Cleveland, Ohio, USA. dwbaker@northwestern.edu
    • Med Care. 2003 Jun 1; 41 (6): 729-40.

    BackgroundIt is unclear whether publicly reporting hospitals' risk-adjusted mortality affects market share and mortality at outlier hospitals.ObjectivesTo examine hospitals' market share and risk-adjusted mortality from 1991 to 1997 at hospitals participating in Cleveland Health Quality Choice (CHQC).Research DesignTime series.SubjectsChanges in market share were examined for all patients hospitalized with acute myocardial infarction, heart failure, gastrointestinal hemorrhage, obstructive pulmonary disease, pneumonia, or stroke at all 30 nonfederal hospitals in Northeast Ohio. Patients insured by Medicare were used to examine changes in mortality.MeasuresTrends in market share (proportion of patients with the target conditions discharged from a given hospital) and risk-adjusted 30-day mortality.ResultsCHQC identified several hospitals with consistently higher than expected mortality. The five hospitals with the highest mortality tended to lose market share (mean change -0.6%, 95% CI -1.9-0.6), but this was not significant. The only outlier hospital with a large decline in market share had declining volume for 2 years before being declared an outlier. Risk-adjusted mortality declined only slightly at hospitals classified by us as "below average" (-0.8%; 95% CI, 2.9-1.8%) or "worst" (-0.4%; 95% CI -2.3-1.7). However, risk-adjusted mortality at one hospital changed from consistently above expected to consistently below expected shortly after first being declared an outlier.ConclusionDespite CHQC's strengths, identifying hospitals with higher than expected mortality did not adversely affect their market share or, with one exception, lead to improved outcomes. This failure may have resulted from consumer disinterest or difficulty interpreting CHQC reports, unwillingness of businesses to create incentives targeted to hospitals' performance, and hospitals' inability to develop effective quality improvement programs.

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