Chest
Original ResearchPulmonary Vascular DiseasePulmonary Embolism: The Weekend Effect
Section snippets
Data Source
We used the Healthcare Cost and Utilization Project Nationwide Inpatient Sample (NIS), a large, publicly available database of inpatient care in the United States. It is an administrative data set created by the Agency for Healthcare Research and Quality from data contributed by participating states. Each year, the NIS includes data on 5 to 8 million hospital stays from about 1,000 hospitals selected to approximate a 20% stratified sample of US hospitals. All hospital types are sampled,
Results
We estimated that there were 1,143,707 discharges with the principal diagnosis of PE among hospitals represented in the NIS during the years 2000 to 2008. Of these, 248,592 (21.7%) were weekend admissions.
Discussion
Using nationally representative data, we show that in-hospital mortality of patients given a principal diagnosis of PE between 2000 to 2008 was significantly higher if patients were admitted on a weekend compared to a weekday. This effect persisted independently from demographic characteristics, hospital characteristics, region, and number of comorbid conditions. Although hospital mortality rates for PE declined across the 9 years we studied, the magnitude of the weekend effect remained
Acknowledgments
Author contributions: Dr Nanchal had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Dr Nanchal: contributed to the study design, statistical analysis, and writing of the manuscript.
Dr Kumar: contributed to the study design, statistical analysis, and writing of the manuscript.
Dr Taneja: contributed to the critical review and revision of the manuscript.
Dr Patel: contributed to the critical review and
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Funding/Support: The authors have reported to CHEST that no funding was received for this study.
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