Table 1.

Baseline characteristics and clinicopathological classification

Characteristic	Category	Data
Age	Mean (yr)	66
	Range	27-95
Gender	Male	n = 115	62.8%
	Female	n = 68	37.2%
Location1	Right side	61	33.3
	Left side	52	28.4
	Rectum	70	38.3
Tumor size (mm)	Mean	45.1
	Range	10-110
	≤ 39	74	40.4
	40-59	62	33.9
	≥ 60	47	25.7
Depth of invasion2	T0	7	3.8
	T1	18	9.9
	T2	22	12.0
	T3	129	70.5
	T4	7	3.8
Histology3	G1	51	27.9
	G2	116	63.4
	G3	16	8.7
TNM stage	I	40	21.8
	II	51	27.9
	III	53	29.0
	IV	39	21.3

¹The colon was divided into the right and left sides at the splenic flexure;

²According to the TNM classification;

³G1: Well-differentiated adenocarcinoma; G2: Moderately differentiated adenocarcinoma; G3:Poorly differentiated adenocarcinoma.