Table 2. Patient and treatment characteristics associated with time to treatment (multivariate analysis).

Factors	Estimated HR of treatment wait (95% CI)	P value*
Age	0.988 (0.974 – 1.002)	0.084
Gender	1.110 (0.806 – 1.527)	0.523
KPS	0.962 (0.937 – 0.987)	0.003
Comorbidity score	0.920 (0.832 –1.017)	0.104
Treatment at VA	1.318 (0.966 – 1.798)	0.082

Abbreviations: KPS = Karnofsky performance score, VA = Veterans Affairs Ann Arbor Healthcare System.

CI = confidence interval, HR = hazard ratio (risk of treatment wait).

^*Multivariate Cox's proportional hazards model.