Table 3.

Multivariable Cox proportional hazards model for overall survival

Variables		No.	Event	Censored	Adjusted HR (95% CI)	P-value
Group	Poor	33	21	12	3.03 (1.66-5.52)	<0.001
	Intermediate	92	40	52	2.30 (1.39-3.79)	0.001
	Good	106	26	80	1
Age (10-year interval)		-	-	-	1.09 (0.85-1.39)	0.489
ECOG PS	2	20	16	4	6.01 (3.25-11.10)	<0.001
	0-1	211	71	140	1

Ten patients with unknown ECOG PS were excluded from this analysis.

Abbreviations: HR: hazard ratio; CI: confidence interval; ECOG PS: Eastern Cooperative Oncology Group performance status.