Related Experiment Videos
Reducing random variation in reported rates of pressure ulcer development
D R Berlowitz1, J J Anderson, A S Ash
1Center for Health Quality, Outcomes, and Economic Research, Bedford VA Hospital, MA 01730, USA.
Medical Care
|June 18, 1998
Summary
Reporting pressure ulcer rates in long-term care facilities can be unstable. Using z-scores, focusing on large facilities, and combining time periods improves the stability of performance estimates.
Area of Science:
- Healthcare quality measurement
- Long-term care facility performance
Background:
- Accurate reporting of pressure ulcer development rates is crucial for assessing long-term care facility performance.
- Observed rates can fluctuate significantly due to random variation and case-mix differences.
Purpose of the Study:
- To evaluate methods for reporting pressure ulcer development rates in long-term care.
- To identify reporting approaches that yield more stable and reliable performance estimates.
Main Methods:
- Calculated facility pressure ulcer development rates over eight time periods.
- Correlated rates using z-scores, combined time periods, and analysis limited to large facilities.
- Compared results with Monte Carlo simulations.
Main Results:
- Observed rates showed considerable variation over time (average correlation of 0.17).
- Z-scores and limiting analysis to large facilities increased correlation.
- Combining two time periods was effective only with other methods; simulation with large facilities yielded a correlation of 0.51.
Conclusions:
- Random variation significantly impacts reported pressure ulcer rates.
- Combining large facility data and multiple time periods enhances performance estimate stability.
- Consider data accuracy, frequency, and provider inclusivity when reporting performance.