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  • Title: When projecting required effectiveness of interventions for hospital readmission reduction, the percentage that is potentially avoidable must be considered.
    Author: van Walraven C, Forster AJ.
    Journal: J Clin Epidemiol; 2013 Jun; 66(6):688-90. PubMed ID: 23245581.
    Abstract:
    OBJECTIVES: Hospitals have strong incentives to decrease readmission rates. Not all hospital readmissions are potentially avoidable. Therefore, only a component of all hospital readmissions can be influenced by interventions designed to decrease them. In this study, we determined how effective interventions must be to attain specific reductions in hospital readmission rates. STUDY DESIGN AND SETTING: A conceptual model of all readmissions and potentially avoidable readmissions was used to derive a mathematical relationship between the relative reduction in the total number of readmissions, the relative reduction in potentially avoidable readmissions, and the proportion of readmissions that are potentially avoidable. RESULTS: When 22% of readmissions were potentially avoidable, achieving a 20% reduction in the total number of readmissions required a 91% reduction in potentially avoidable readmissions; decreasing potentially avoidable readmissions by 20% reduced total readmissions by 4.4%. CONCLUSION: These results highlight that relative reductions in the total number of readmissions are notably lower than that for potentially avoidable readmissions. This separation in relative reduction of all and potentially avoidable readmissions increases as the proportion of readmissions deemed potentially avoidable decreases. These results have important implications for health care planners and researchers.
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