Understanding practice variation with a clinical pathways system: Differences by physician and practice factors, and changes in practice over time.

2079 Background: Clinical oncology pathways aim to support clinical decision-making and reduce unwarranted practice variation across an enterprise. The Dana-Farber Cancer Institute (DFCI) implemented web-based oncology pathways with DFCI-customized content in each disease center and at each of its satellites. Our pre-specified aim was an on-pathway rate of 70-85%. Methods: Treatment decisions were electronically captured as on- or off- pathway....