Comparison of the rBaux Model with Harborview (HMC) and ABA-NBR Data for Standard Admissions.

Mortality generally declined over time in the Harborview standard admission data and in 2005–2009 mortality matched rBaux prediction save in Group 2, less than predicted, and 5, slightly more than predicted (bold). There was little change in the ABA-NBR standard admission mortality over time and mortality matched the rBaux predicted mortality in all groups. Since the ABA-NBR data from 2000–2007 was used to build the rBaux system, this is not surprising. However the ABA-NBR data from 1995–1999 also matched suggesting that rBaux scores are robust over time and that there has been little improvement in survival since 1995. (x%/y/z x = percent observed mortality, y = sample size and CC = the number placed on comfort care).