Bootstrap based regression trees for patient classification in the Austrian DRG-system

Karl-Peter Pfeiffer, Thomas Grubinger & Conrad Kobel
Introduction: In 1997 a regression tree based patient classification system for all inpatients in Austria was introduced. Since this time the so-called “Austrian DRG-system” is regularly updated. Background: The classification rules are based on regression tree models which terminal[for full text, please go to the a.m. URL]