Table 1. Clinical characteristics of 84 patients with colorectal cancer. The p-values were calculated by Mann Whitney test.

Variables	Patients (n = 84)	p-value
Sex:
male	37	0.172
female	47
Age (years):	63 (34-82)	0.774
Tumor localization:
cecum or colon	53	0.051
rectum	27
Type of tumor:
tubular	59	0.375
mucinous	10
Histological grading:
G1 or G2	59	0.692
G3	24
TNM staging:
I or II	46	0.261
III or IV	38
Size and depth of primary tumor invasion (T):
pT1 or pT2	22	0.04
pT3 or pT4	62
Presence of metastases in the regional lymph nodes (N):
N0	48	0.439
N1 or N2	31
Distant metastases (M):
presence of metastases	14	0.782
lack of metastases	68
Lymphocytes in tumor tissue:
presence of lymphocytes	37	0.179
lack of lymphocytes	47
Vessel invasion:
presence of vascular invasion	53	0.219
lack of vascular invasion	31