Table 6.

Univariate and multivariate analyses of demographic and histopathological characteristics.

	Univariate analysis			Multivariate analysis
	P value	HR	95% CI	P value	HR	95% CI
Gender
Age ≥70	0.00	2.27	1.52–3.38	0.00	2.12	1.42–3.14
T stage	0.29	1.017	0.69–1.49
N stage	0.00	2.42	1.53–3.83	0.00	2.49	1.57–3.93
CRM	0.00	1.46	0.97–2.19
Differentiation	0.43	0.95	0.66–1.37
Positive resection margins	0.001	1.68	1.05–2.70	0.007	1.85	1.18–2.9
Recurrence	0.00	1.68	1.12–2.52	0.004	1.787	1.20–2.66

HR: hazard ration, CI: confidence interval, CRM: circumferential resection margins.