Table I.

Data analysis: estimation of two working Cox PH models.

	Failure time model				Censoring time model
Covariates	Estimate	SE	p-value	Rel-Import	Estimate	SE	p-value	Rel-Import
Cox PH model
Age	−0.024	0.0170	0.15	−0.02	0.031	0.0078	<0.01	−0.05
Log(PSA)	0.173	0.1267	0.17	0.13	−0.115	0.0536	0.03	0.17
Gleason	0.405	0.1037	<0.001	0.30	0.092	0.0494	0.06	−0.14
T stage	1.355	0.2184	<0.001	1.00	−0.679	0.0849	<0.001	1.00
Total dose	−0.111	0.0300	<0.001	−0.08	0.176	0.0141	<0.001	−0.26
Buckley–James estimators
Age	0.024	0.012	0.05	−0.02	−0.011	0.004	<0.01	−0.03
Log(PSA)	−0.198	0.090	0.03	0.20	0.015	0.030	0.61	0.05
Gleason	−0.360	0.083	<0.001	0.34	−0.066	0.025	0.01	−0.23
T stage	−1.062	0.198	<0.001	1.00	0.286	0.047	<0.001	1.00
Total dose	0.050	0.022	0.02	−0.05	−0.073	0.006	<0.001	−0.26

Rel-Import denotes coefficient estimate relative to T stage coefficient.

PH, proportional hazards; PSA, prostate-specific antigen; SE, standard error.