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Lesion-Specific Factors Contributing to Inhospital Costs in Adults With Congenital Heart Disease

      The population of adults with congenital heart disease (ACHD) in the United States is growing rapidly with concomitant increases in care costs. We sought to define the variables having the greatest influence on annual cost of inpatient care in patients with ACHD in the United States. To do so, we conducted a retrospective analysis of admissions in patients >18 years old with a 3-digit International Classification of Disease, Ninth Revision, code of 745 to 747 from the State Inpatient Databases of Arkansas (2008 to 2010), California (2003 to 2012), Florida (2005 to 2012), Hawaii (2006 to 2010), Nebraska (2003 to 2011), and New York (2005 to 2012). We selected variables we believed would have the greatest effect on care costs and built a series of multivariable regression models grouping patients by congenital lesion to examine the relative contribution of the specified variables to total annual inpatient cost. We analyzed a total of 68,314 patients aged 57 ± 18.6 years, 51% of whom were women. The multivariable regression model had an overall R2 of 0.35. Readmission was responsible for 10.3% of annual inpatient cost among all patients with ACHD and had the greatest effect on inpatient care cost for each congenital lesion except Eisenmenger syndrome and conotruncal abnormalities, for both of which it was the second most significant contributor. Other major contributors to annual inpatient care costs included length of stay and operative procedures. In conclusion, rehospitalization is the most significant contributor to annual inpatient cost for individual patients with ACHD in the United States, regardless of underlying anatomy.
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