Table 4.

Death risk according to the main prognostic factors by Cox multivariate regression analysis.

Variable	Category	HR*	[95% Conf. Interv.]	HR§	[95% Conf. Interv.]
Tumor fixation	Semi-fixed	1.0	Reference	1.0	Reference
	Fixed	3.87	(2.1 – 7.0)	2.64	(1.2 – 5.7)
Postoperative	N0	1.0	Reference	1.0	Reference
N stage	N1/N2	2.51	(1.3 – 4.9)	2.13	(1.0 – 4.4)

* Crude harzard risk

^§ Adjusted harzard risk for age (median of 61 years)