Table 4.

Prognostic factors for extension of circumferential resection margins involvement, with CRM as continuous variable in mm: logistic and linear regression univariate analysis

Factor	Regression coefficient	95% Confidential interval		P value
		Lower	Upper
Year of surgery	0.042	−0.167	0.251	0.693
Type of resection	−0.008	−0.054	0.038	0.737
Histology type	−0.027	−0.099	0.045	0.465
Localization	−0.015	−0.083	0.054	0.666
Tumor grade	−0.031	−0.085	0.022	0.251
Stage	−0.272	−0.358	−0.186	<0.001
pT stage	−0.110	−0.186	−0.034	0.005
pN stage	−0.073	−0.112	−0.033	<0.001
pM stage	−0.010	−0.024	0.005	0.187
Tumor growth (spray)	0.052	0.012	0.092	0.011
Perineural invasion	−0.036	−0.072	0.000	0.048
Lymph vascular space involvement	−0.078	−0.116	−0.040	<0.001
>4 positive lymph nodes	−0.040	−0.071	−0.010	0.010
Lymph node ratio >0.20	−0.047	−0.084	−0.010	0.014
Tumor length (cm)	−0.370	−0.579	0.160	0.001