Bob Luttman, Robert Luttman & Associates
Statistical Issues
Operational Issues: Documentation and Reporting
Traditional Pathway / Variance Documentation
Statistical Issues
Variance data is, potentially, the mother lode of clinical process improvement data. Everyone wants the data, and visions of regression functions dance in analytical minds.
Then reality bites. Hard.
Statistical issues seriously limit what you can and cannot do with all that data you've collected. Variance data is - foremost - process data; and process data is inherently messy. These are not clinical trials, they are real world experiences.
The most serious statistical issues are :
- Multi-collinearity: the lack of statistical independence amongst variances.
- Cascade Effect: today's variances causes tomorrow's variances.
- Sample Size: you can't have more variables than patients.
- Halo Effect: everybody's LOS is declining.
