. Author manuscript; available in PMC: 2013 Sep 25.

Published in final edited form as: Int J Radiat Oncol Biol Phys. 2010 Oct 1;81(3):623–630. doi: 10.1016/j.ijrobp.2010.06.012

Table 5.

Application of the simplified original RPA model to the expanded RTOG GBM (training) database

RPA class	Median Survival	Median Survival Time	Overall Survival Rates
RPA class	Median Survival	Median Survival Time	1 year	3 years	5 years
III	< 50 y and KPS ≥ 90	17.1 months	70%	20%	14%
IV	< 50 y and KPS < 90;	11.2 months	46%	7%	4%
IV	≥ 50 y, KPS ≥ 70, resection, and working;	11.2 months	46%	7%	4%
V+VI	≥ 50 y, KPS ≥ 70, resection, and not working;	7.5 months	28%	1%	0%
	≥ 50 y, KPS ≥ 70, biopsy only;
	≥ 50 y, KPS < 70

RPA, recursive partitioning analysis; RTOG, Radiation Therapy and Oncology Group; GBM, glioblastoma multiforme; KPS, Karnofsky Performance Score.