Table 3. Multivariate Cox regression analyses for DSS.

Variable	AJCC 7th edition pN stage			Modified pN stage
	HR	CI (95%)	P-value	HR	CI (95%)	P-value
T			0.047			0.15
⩽T1	Ref	–	–	Ref	–	–
T2	1.909	0.436–8.361	0.391	2.124	0491–9.196	0.314
⩾T3	4.277	0.921–19.871	0.064	3.711	0.802–17.169	0.093
G			0.783			0.506
G1	Ref	–	–	Ref	–	–
G2	1.002	0.476–2.112	0.995	1.16	0.551–2.444	0.696
G3	1.39	0.515–3.749	0.516	1.771	0.677–4.632	0.244
pN stage			0.002			–
pN1	Ref	–	–	–	–	–
pN2	3.979	0.861–17.475	0.078	–	–	–
pN3	10.561	2.317–48.127	0.002	–	–	–
Modified pN stage						0.001
pN1	–	–	–	Ref	–	–
pN2	–	–	–	4.877	1.316–18.074	0.018
pN3	–	–	–	10.895	3.104–38.244	<0.001

Abbreviations: CI (95%)=95% confidence interval; HR=hazard ratio; Ref=reference.