Abstract 18075: Resource Utilization in Patients with Mitral Regurgitation Before and After Surgical Intervention: An Analysis of the Centers for Medicare and Medicaid Services Database
PURPOSE: The purpose of this study is to characterize resource utilization in Medicare beneficiaries with mitral regurgitation by comparing hospitalization rates and costs before and after surgical intervention.
METHODS: De-identified inpatient claims data were obtained from the Centers for Medicare and Medicaid services for 1/1/2001 to 12/31/2005. Medicare beneficiaries with functional mitral regurgitation (ICD9: 424.0) who received mitral valve surgery (ICD9 codes: 35.12, 35.23, 35.24, 35.33) during this time period were included in analysis (N=68,344). Only claims data 1 year before (N=44,190) and 1 year after surgical intervention (N=78,600) was analyzed. Costs from surgical intervention hospitalization was excluded from analysis. Outcome measures included median inpatient costs, hospitalization rates and length of stay. Costs were estimated using ratio-of-costs-to-charges, and age-adjusted hospital costs were compared using quantile regression. Primary ICD9 diagnosis code was used to categorize type of hospitalization.
RESULTS (TABLE): Median hospitalization costs for patients prior to surgical intervention were higher than after (p<0.05). Mean hospitalization rate in the year prior to surgical intervention was lower than in the year immediately following (p<0.001). Mean LOS was also longer after surgical intervention compared to before (p<0.001). A greater proportion of hospitalizations before surgery were associated with Congestive Heart Failure (ICD9: 428.0) compared to after (p<0.001).
CONCLUSIONS: Even though LOS and readmission rates are higher in Medicare beneficiaries in the year following surgical intervention, hospitalization costs are significantly lower. This may be secondary to fewer Congestive Heart Failure hospitalizations after surgical intervention.
- © 2011 by American Heart Association, Inc.