Table 2. Univariate and Multivariate Analysis of Variables Associated With DFS in Patients Submitted to an R0 Resection.

		Median Survival (years)
Variable	No. of Patients	Median	Range	P (univariate)	P (multivariate)	Hazard Ratio	95% CI
Tumor size
≤ 3cm	33	> 3.20	0.08–4.92	0.028	0.732	0.864	0.373 to 1.998
> 3cm	38	1.25	0.17–4.25
Tumor stage
T1/T2	43	> 3.04	0.17–4.92	0.032	0.200	0.569	0.240 to 1.348
T3/T4	28	1.25	0.08–4.25
Regional lymph nodes positive
No	51	3.08	0.17–4.92	0.072	0.702	0.857	0.388 to 1.892
Yes	20	1.00	0.08–4.00
TNM stage
I/II	25	> 3.36	0.17–4.92	0.028	0.830	0.896	0.330 to 2.436
III/IV	46	1.25	0.08–4.25
PRR11
Negative	16	> 4.26	0.08–4.92	< 0.001	0.001	0.129	0.037 to 0.446
Positive	55	1.71	0.08–4.00
CA199 levels
Low	16	1.83	0.42–4.92	0.054	0.420	0.759	0.388 to 1.483
High	55	1.00	0.08–4.00