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Updated: Jun 13, 2026

Murine Oropharyngeal Aspiration Model of Ventilator-associated and Hospital-acquired Bacterial Pneumonia
Published on: June 28, 2018
Underestimating the impact of ventilator-associated pneumonia by use of surveillance data
Marci Drees1, Sherry Hausman, Andrea Rogers
1Christiana Care Health System, Wilmington, Delaware, USA. mdrees@christianacare.org
Abstract:
We calculated rates of ventilator-associated pneumonia (VAP) by using surveillance data, clinical data, and coding data. Compared with the VAP rates calculated on the basis of surveillance data, the VAP rates calculated on the basis of coding data were significantly overestimated in 4 of 5 intensive care units. Efforts to improve coding and clinical documentation will address much but not all of this discrepancy between surveillance and administrative data.
Insights
Ventilator-associated pneumonia (VAP) rates were overestimated when using administrative coding data compared to surveillance data in most intensive care units. Improving documentation may reduce, but not eliminate, this discrepancy.
Area of Science:
- Healthcare quality measurement
- Infection control
- Health informatics
Background:
- Accurate measurement of healthcare-associated infections is crucial for quality assessment.
- Ventilator-associated pneumonia (VAP) is a significant intensive care unit (ICU) complication.
- Discrepancies between surveillance and administrative data can impact quality reporting.
Purpose of the Study:
- To compare ventilator-associated pneumonia (VAP) rates derived from surveillance data versus administrative coding data.
- To identify the extent of overestimation of VAP rates using coding data.
- To inform strategies for improving data accuracy in ICUs.
Main Methods:
- Retrospective analysis of patient data from intensive care units (ICUs).
- Calculation of VAP incidence rates using both clinical surveillance data and administrative coding data.
- Statistical comparison of VAP rates between the two data sources across multiple ICUs.
Main Results:
- Ventilator-associated pneumonia (VAP) rates derived from coding data were significantly overestimated in 4 out of 5 ICUs compared to surveillance data.
- The magnitude of overestimation varied across different intensive care units.
- A notable discrepancy exists between infection rates captured by direct surveillance and those recorded in administrative databases.
Conclusions:
- Administrative coding data significantly overestimates ventilator-associated pneumonia (VAP) rates in most ICUs.
- Improving clinical documentation and coding practices is necessary but may not fully resolve the observed data discrepancies.
- Reliance solely on coding data for VAP surveillance may lead to inaccurate quality assessments.
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