The objective of this study was to characterize variation in mortality rates across hospitals performing percutaneous coronary intervention (PCI) in the United States. For this purpose, data (n = 735,022) from the Nationwide Inpatient Sample from 1996 to 2001 were analyzed. The primary outcome for the analysis was postprocedural in-hospital mortality. Mortality rates were calculated by race, gender, geographic region, comorbid status and hospital volume. There were significant variations in mortality across gender groups, comorbid status, regions and by hospital volume status. Independent predictors of mortality in this large cohort were older age, female gender, lower income and lower hospital volume. The data suggests targets for quality improvement initiatives for patients undergoing PCI particularly in the elderly, females, lower income patients and low volume hospitals. Even in the contemporary era of adjunctive pharmacological therapies and ubiquitous use of stents, hospital volume remains a significant independent predictor of in-hospital mortality.
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