Table 2. Multivariate Analysis of Factors Predictive of Locoregional Recurrence–Free Survival, Disease-Free Survival, Distant Metastasis–Free Survival, and Overall Survival.

Variable	Hazard Ratio (95% CI)	P Value
Locoregional Recurrence–Free Survival
Treatment with chemotherapy + RT	0.08 (0.02-0.39)	<.01
Age	0.93 (0.88-0.98)	.01
Tumor size	1.01 (0.72-1.42)	.95
No. of lymph nodes removed	0.93 (0.84-1.02)	.13
Pathologic T stage
pT2	1.19 (0.12-12.01)	.88
pT4	1.59 (0.40-6.38)	.51
Disease-Free Survival
Treatment with chemotherapy + RT	0.53 (0.27-1.06)	.07
Age	0.97 (0.93-0.99)	.04
Tumor size	1.03 (0.83-1.27)	.80
Pathologic T stage
pT2	0.24 (0.03-1.78)	.16
pT4	1.30 (0.58-2.94)	.52
Distant Metastasis–Free Survival
Treatment with chemotherapy + RT	1.01 (0.37-2.76)	.99
Age	0.96 (0.92-1.01)	.12
Tumor size	0.93 (0.69-1.25)	.63
No. of lymph nodes removed	1.08 (1.00-1.16)	.05
Pathologic T stage
pT2	1 [Reference]	NA
pT4	1.47 (0.48-4.54)	.50
Overall Survival
Treatment with chemotherapy + RT	0.61 (0.33-1.11)	.11
Age	0.98 (0.95-1.01)	.27
Tumor size	0.98 (0.81-1.18)	.83
Pathologic T stage
pT2	0.18 (0.02-1.34)	.10
pT4	1.29 (0.63-2.64)	.49

Abbreviations: NA, not applicable; RT, radiotherapy.