Aaron S Lord1, Ariane Lewis2, Barry Czeisler2, Koto Ishida2, Jose Torres2, Hooman Kamel2, Daniel Woo2, Mitchell S V Elkind2, Bernadette Boden-Albala2. 1. From the Department of Neurology, New York University School of Medicine (A.S.L., A.L., B.C., K.I., J.T., B.B.-A.); Department of Neurology, Weill Cornell Medical College, New York, NY (H.K.); Department of Neurology and Rehabilitation, University of Cincinnati College of Medicine, OH (D.W.); Departments of Neurology and Epidemiology, Columbia University, New York, NY (M.S.V.E.); and Division of Epidemiology, College of Global Public Health, New York University (B.B.-A.). aaron.lord@nyumc.org. 2. From the Department of Neurology, New York University School of Medicine (A.S.L., A.L., B.C., K.I., J.T., B.B.-A.); Department of Neurology, Weill Cornell Medical College, New York, NY (H.K.); Department of Neurology and Rehabilitation, University of Cincinnati College of Medicine, OH (D.W.); Departments of Neurology and Epidemiology, Columbia University, New York, NY (M.S.V.E.); and Division of Epidemiology, College of Global Public Health, New York University (B.B.-A.).
Abstract
BACKGROUND AND PURPOSE: Infections are common after intracerebral hemorrhage, but little is known about the risk of serious infection requiring readmission after hospital discharge. METHODS: To determine if infections are prevalent in patients readmitted within 30 days of discharge, we performed a retrospective cohort study of patients discharged from nonfederal acute care hospitals in California with a primary diagnosis of intracerebral hemorrhage between 2006 and 2010. We excluded patients who died during the index admission, were discharged against medical advice, or were not California residents. Our main outcome was 30-day unplanned readmission with primary infection-related International Classification of Diseases, Ninth Revision, Clinical Modification code. RESULTS: There were 24 540 index intracerebral hemorrhage visits from 2006 to 2010. Unplanned readmissions occurred in 14.5% (n=3550) of index patients. Of 3550 readmissions, 777 (22%) had an infection-related primary diagnosis code. When evaluating primary and all secondary diagnosis codes, infection was associated with 1826 (51%) of readmissions. Other common diagnoses associated with readmission included stroke-related codes (n=840, 23.7%) and aspiration pneumonitis (n=154, 4.3%). The most common infection-related primary diagnosis codes were septicemia (n=420, 11.8%), pneumonia (n=124, 3.5%), urinary tract infection (n=141, 4.0%), and gastrointestinal infection (n=42, 1.2%). Patients with a primary infection-related International Classification of Diseases, Ninth Revision, Clinical Modification code on readmission had higher in-hospital mortality compared with other types of readmission (15.6% versus 8.0%, P<0.001). After controlling for other predictors of mortality, primary infection-related readmissions remained associated with in-hospital mortality (relative risk, 1.7; 95% confidence interval, 1.3-2.2). CONCLUSIONS: Infections are associated with a majority of 30-day readmissions after intracerebral hemorrhage and increased mortality. Efforts should be made to reduce infection-related complications after hospital discharge.
BACKGROUND AND PURPOSE:Infections are common after intracerebral hemorrhage, but little is known about the risk of serious infection requiring readmission after hospital discharge. METHODS: To determine if infections are prevalent in patients readmitted within 30 days of discharge, we performed a retrospective cohort study of patients discharged from nonfederal acute care hospitals in California with a primary diagnosis of intracerebral hemorrhage between 2006 and 2010. We excluded patients who died during the index admission, were discharged against medical advice, or were not California residents. Our main outcome was 30-day unplanned readmission with primary infection-related International Classification of Diseases, Ninth Revision, Clinical Modification code. RESULTS: There were 24 540 index intracerebral hemorrhage visits from 2006 to 2010. Unplanned readmissions occurred in 14.5% (n=3550) of index patients. Of 3550 readmissions, 777 (22%) had an infection-related primary diagnosis code. When evaluating primary and all secondary diagnosis codes, infection was associated with 1826 (51%) of readmissions. Other common diagnoses associated with readmission included stroke-related codes (n=840, 23.7%) and aspiration pneumonitis (n=154, 4.3%). The most common infection-related primary diagnosis codes were septicemia (n=420, 11.8%), pneumonia (n=124, 3.5%), urinary tract infection (n=141, 4.0%), and gastrointestinal infection (n=42, 1.2%). Patients with a primary infection-related International Classification of Diseases, Ninth Revision, Clinical Modification code on readmission had higher in-hospital mortality compared with other types of readmission (15.6% versus 8.0%, P<0.001). After controlling for other predictors of mortality, primary infection-related readmissions remained associated with in-hospital mortality (relative risk, 1.7; 95% confidence interval, 1.3-2.2). CONCLUSIONS:Infections are associated with a majority of 30-day readmissions after intracerebral hemorrhage and increased mortality. Efforts should be made to reduce infection-related complications after hospital discharge.
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