Table 3.

Multivariate analysis of DFS and OS in esophageal squamous cell carcinoma

Variable	DFS			OS
	RR	95%CI	P	RR	95%CI	P
Sex: Woman/Man	0.8	0.6–1.1	0.150	0.8	0.6–1.1	0.132
Tumor length: >4.0 cm/≤4.0 cm	1.2	0.9–1.5	0.266	1.1	0.8–1.4	0.713
Perineural invasion: Present/ Absent	1.6	1.2–2.1	0.001	1.4	1.1–1.9	0.017
p T stage: T3 + T4/T1 + T2	1.3	0.9–1.7	0.136	1.3	1.0–1.9	0.083
p N stage: N0/N1 + N2 + N3	2.0	1.5–2.6	<0.001	2.0	1.5–2.7	<0.001