Original ArticlesRespiratory syncytial virus pneumonia in the hospital setting: Length of stay, charges, and mortality☆,☆☆
Section snippets
Data Sources
The analysis was conducted by using the National Inpatient Sample from the Healthcare Cost and Utilization Project coordinated by the Agency for Health Care Policy and Research, releases 2, 3, and 4 for the years 1993, 1994, and 1995, respectively. This represented the most current data available. With approximately 6.5 million discharge records per year, the NIS represents approximately 20% of US hospitalizations. The NIS includes discharge weighting that enables national projections and the
Results
A total of 10,767 cases of RSV pneumonia were identified from the NIS sample as follows: 3161 records from 1993, 3658 records from 1994, and 3948 records from 1995. Cases with missing data were dropped from the analysis (9 cases were dropped from the length-of-stay analysis, 358 cases were dropped from the charges analysis, and 2 cases were dropped from the mortality analysis). After the application of the appropriate weights for the HCUP-3 data sets, a 1993 national weighted estimate of 16,500
Discussion
Our findings regarding the burden of RSV pneumonia are similar to the Institute of Medicine mortality estimates and the cost and hospitalization estimates made by the National Institute of Allergy and Infectious Diseases and the World Health Organization.7, 8 Our estimate may in fact be lower than the actual disease burden attributable to RSV, since we did not include RSV bronchiolitis in our analysis (because there was no code for such cases in the ICD-9 system until October 1, 1996). Shay et
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Supported by a grant from MedImmune, Inc.
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