Risk Adjustment Based Upon Resource Utilization - Text Mining Techniques for Healthcare Provider Quality Determination - page 285

Figure 37. Average error for length of stay using all indices
Figure 38. Decision tree for prediction of length of stay
dIscussIon
The disease staging for mortality, severity, and resource usage still has problems with the misclassifica-
tion rate. The three types of models studied in this and the previous two chapters: Charlson, APRDRG,
and Disease Staging have only a low level of correlation. Therefore, there remains a serious lack of
consistency when defining the patient condition. Unfortunately, as we have also shown, the tendency
to upcode to improve a provider's standing will remain a serious problem as long as regression-based