Table 1 Clinico-pathologic features of tumors in different groups^a.

Variables	Categories	Group 1	Group 2	Group 3	p value
Age (years)	Mean	70.0	68.2	67.5
Age (years)	Median	73.5	71	69	0.58^b
Gender	Male	18 (47%)	23 (47%)	27 (42%)
Gender	Female	20 (53%)	26 (53%)	37 (58%)	0.83
Tumor size (cm)	Mean	5.80	5.12	4.61
Tumor size (cm)	Median	5.25	4.50	3.80	0.017^b
Tumor grade	Low	32 (84%)	33 (67%)	54 (84%)
Tumor grade	High	6 (16%)	16 (33%)	10 (16%)	0.06
Lymphovascular invasion	Absent	16 (42%)	27 (55%)	40 (62%)
	Suspicious	4 (11%)	2 (4%)	7 (11%)
	Present	18 (47%)	20 (41%)	17 (27%)	0.15
Large vessel invasion	Absent	34 (89%)	40 (82%)	62 (97%)
Large vessel invasion	Present	4 (11%)	9 (18%)	2 (3%)	0.027
Tumor deposits	Absent	29 (76%)	36 (73%)	58 (91%)
Tumor deposits	Present	9 (24%)	13 (27%)	6 (9%)	0.043
Lymph node metastases	Mean	2.68	2.49	1.05
Lymph node metastases	Median	0.50	1.00	0.00	0.012^b
Metachronous distant metastases (including peritoneum)	Absent	25 (66%)	32 (65%)	57 (89%)
Metachronous distant metastases (including peritoneum)	Present	13 (34%)	17 (35%)	7 (11%)	0.004

^aGroup 1—T4a colonic adenocarcinoma at the serosal surface; Group 2—Deeply invasive colonic adenocarcinoma ≤1 mm from the serosal surface; Group 3—T3 colonic adenocarcinoma >1 mm from the serosal surface.
^bKruskal–Wallis p value.

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