. 2009 Dec 22;12(2):164–172. doi: 10.1093/neuonc/nop019

Table 9.

Prognostic factors for PFS: Cox PH model results

	PS^a	Current TMZ^a	Grade^a	Ln (DxTime)^a	Year of study entry^a
Hazard ratio	1.28	0.62	1.82	1.17	1.02
P-value	<.0001	<.0001	<.0001	.0004	.008

Abbreviations: TMZ, temozolomide; DxTime, time from initial diagnosis; PS, performance score; Cox Ph, Cox proportional hazard.

^aVariables identified as significant (≤.05) in at least 70% of 500 bootstrap samples.