Catheterization for Congenital Heart Disease Adjustment for Risk Method (CHARM)

Published on Sep 1, 2011in Jacc-cardiovascular Interventions8.432
· DOI :10.1016/J.JCIN.2011.05.021
Lisa Bergersen32
Estimated H-index: 32
(Boston Children's Hospital),
Kimberlee Gauvreau86
Estimated H-index: 86
(Boston Children's Hospital)
+ 15 AuthorsKathy J. Jenkins64
Estimated H-index: 64
(Boston Children's Hospital)
Sources
Abstract
Objectives This study sought to develop a method to adjust for case mix complexity in catheterization for congenital heart disease to allow equitable comparisons of adverse event (AE) rates. Background The C3PO (Congenital Cardiac Catheterization Project on Outcomes) has been prospectively collecting data using a Web-based data entry tool on all catheterization cases at 8 pediatric institutions since 2007. Methods A multivariable logistic regression model with high-severity AE outcome was built using a random sample of 75% of cases in the multicenter cohort; the models were assessed in the remaining 25%. Model discrimination was assessed by the C-statistic and calibration with Hosmer-Lemeshow test. The final models were used to calculate standardized AE ratios. Results Between August 2007 and December 2009, 9,362 cases were recorded at 8 pediatric institutions of which high-severity events occurred in 454 cases (5%). Assessment of empirical data yielded 4 independent indicators of hemodynamic vulnerability. Final multivariable models included procedure type risk category (odds ratios [OR] for category: 2 = 2.4, 3 = 4.9, 4 = 7.6, all p Conclusions Using CHARM (Catheterization for Congenital Heart Disease Adjustment for Risk Method) to adjust for case mix complexity should allow comparisons of AE among institutions performing catheterization for congenital heart disease.
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