• J Am Med Dir Assoc · Oct 2013

    Predictors of rehospitalization among elderly patients admitted to a rehabilitation hospital: the role of polypharmacy, functional status, and length of stay.

    • Alessandro Morandi, Giuseppe Bellelli, Eduard E Vasilevskis, Renato Turco, Fabio Guerini, Tiziana Torpilliesi, Salvatore Speciale, Valeria Emiliani, Simona Gentile, John Schnelle, and Marco Trabucchi.
    • Department of Rehabilitation and Aged Care Hospital Ancelle, Cremona, Italy; Geriatric Research Group, Brescia, Italy; Center for Quality Aging, Department of Medicine, Vanderbilt University, Nashville, TN. Electronic address: morandi.alessandro@gmail.com.
    • J Am Med Dir Assoc. 2013 Oct 1; 14 (10): 761-7.

    ObjectivesRehospitalizations for elderly patients are an increasing health care burden. Nonetheless, we have limited information on unplanned rehospitalizations and the related risk factors in elderly patients admitted to in-hospital rehabilitation facilities after an acute hospitalization.SettingIn-hospital rehabilitation and aged care unit.DesignRetrospective cohort study.ParticipantsElderly patients 65 years or older admitted to an in-hospital rehabilitation hospital after an acute hospitalization between January 2004 and June 2011.MeasurementsThe rate of 30-day unplanned rehospitalization to hospitals was recorded. Risk factors for unplanned rehospitalization were evaluated at rehabilitation admission: age, comorbidity, serum albumin, number of drugs, decline in functional status, delirium, Mini Mental State Examination score, and length of stay in the acute hospital. A multivariable Cox proportional regression model was used to identify the effect of these risk factors for time to event within the 30-day follow-up.ResultsAmong 2735 patients, with a median age of 80 years (interquartile range 74-85), 98 (4%) were rehospitalized within 30 days. Independent predictors of 30-day unplanned rehospitalization were the use of 7 or more drugs (hazard ratio [HR], 3.94; 95% confidence interval, 1.62-9.54; P = .002) and a significant decline in functional status (56 points or more at the Barthel Index) compared with the month before hospital admission (HR 2.67, 95% CI: 1.35-5.27; P = .005). Additionally, a length of stay in the acute hospital of 13 days or more carried a twofold higher risk of rehospitalization (HR 2.67, 95% CI: 1.39-5.10); P = .003).ConclusionsThe rate of unplanned rehospitalization was low in this study. Polypharmacy, a significant worsening of functional status compared with the month before acute hospital admission, and hospital length of stay are important risk factors.Copyright © 2013 American Medical Directors Association, Inc. All rights reserved.

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