Kwok, CS, Capers IV, Q, Savage, M, Gulati, M, Potts, J, Mohamed, MO, Nagaraja, V, Patwala, A, Heatlie, G, Kontopantelis, E, Fischmann, D and Mamas, M (2020) Unplanned hospital readmissions after acute myocardial infarction: A nationwide analysis of rates, trends, predictors and causes in the United States between 2010 and 2014. Coronary Artery Disease, 31 (4). pp. 354-364. ISSN 0954-6928

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Unplanned hospital readmissions are an important quality metric for benchmarking but there is limited data following an acute myocardial infarction (AMI). This study aims to examine the 30-day unplanned readmission rate, predictors, causes and outcomes after hospitalization for AMI.

The U.S. Nationwide Readmission Database was utilized to analyze patients with a primary diagnosis of AMI between 2010-2014. Rates of readmissions, causes and costs were determined and multiple logistic regressions were used to identify predictors of readmissions.

Results: Of 2,204,104 patients with AMI the 30-day unplanned readmission rate was 12.3%(n=270,510), which changed from 13.0%-11.5% between 2010-2014. The estimated impact of readmissions in AMI was ~694 million USD and ~279,000 additional bed days per year. Comorbidities such as diabetes (OR 1.27 95%CI 1.25-1.29), chronic lung disease (OR 1.29 95%CI 1.26-1.31), renal failure (OR 1.38 95%CI 1.35-1.40) and cancer (OR 1.35 95%CI 1.30-1.41) were independently associated with unplanned readmission. Discharge against medical advice was the variable most strongly associated with unplanned readmission (OR 2.40 95%CI 2.27-2.54). Non-cardiac causes for readmissions accounted for 52.9% of all readmissions. The most common cause of cardiac readmission was heart failure (14.3%) and for non-cardiac readmissions was infections (8.8%).

Conclusions: Readmissions during the first month after AMI occur in more than 1 in 10 patients resulting in a healthcare cost of ~694 million USD per year and ~279,000 additional bed days per year. These finding have important public health implications. Strategies to identify and reduce readmissions in AMI will dramatically reduce health care costs for society.

Item Type: Article
Additional Information: This is the accepted author manuscript (AAM). The final published version (version of record) will be available online via Lippincott, Williams & Wilkins at - Please refer to any applicable terms of use of the publisher.
Uncontrolled Keywords: acute myocardial infarction, readmissions, cost
Subjects: R Medicine > R Medicine (General) > R735 Medical education. Medical schools. Research
R Medicine > RA Public aspects of medicine > RA0421 Public health. Hygiene. Preventive Medicine
R Medicine > RC Internal medicine > RC666 Diseases of the circulatory (Cardiovascular) system
Divisions: Faculty of Medicine and Health Sciences > School of Primary, Community and Social Care
Depositing User: Symplectic
Date Deposited: 27 Nov 2019 11:11
Last Modified: 15 Jan 2021 01:30

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