Prevalence and patterns of potentially avoidable hospitalizations in the US long-term care setting

Objective: We examined the magnitude and related costs of potentially avoidable hospitalizations including re-hospitalizations for long-stay residents in nursing homes. Design: We conducted our investigation as a retrospective cohort study where the cohort comprised individuals who were eligible for Medicare and had spent at least 120 uninterrupted days in a nursing home in New York State between 2004 and 2007. To conduct the study, we linked the Minimum Data Set, Medicare Provider Assessment File and Provider of Service File. Measurements: We defined a potentially avoidable hospitalization as one where a resident was admitted to a hospital for which the principle diagnosis was 1 of 15 ambulatory care sensitive (ACS) conditions. Results: Although the percentage of total hospitalizations for ACS conditions declined during the study period, 20% or more of annual hospitalizations were for ACS conditions entailing Medicare payments in excess of $ 450 million. Approximately 40% of the residents who were hospitalized once for an ACS condition were re-hospitalized during the study period for the same or different ACS condition. Conclusion: During the study period, potentially avoidable hospitalizations from nursing homes were a common occurrence in New York. A substantial percentage of such hospitalizations involved residents who had been previously hospitalized, in some cases multiple times, for an ACS condition. Although the observed decline in ACS-related hospitalizations suggests improvements in nursing home care, various policy and managerial-level initiatives may be needed to ensure that nursing home residents are not exposed to a substantial risk of avoidable hospitalizations in the future.