Effect of screening colonoscopy frequency on colorectal cancer mortality in patients with a family history of colorectal cancer

Table 1 Comparison of clinical and pathological data between the two groups

	Laparoscopic colectomy group (n = 63)	Open colectomy group (n = 41)	P value
Age (yr)	72.3 ± 5.0	70.8 ± 4.3	0.109
Sex (n)		0.532	0.466
Male	37	27
Female	26	14
Tumor size (cm)	4.7 ± 2.3	4.4 ± 1.4	0.406
Tumor location (n)			0.281
Colon	36	19
Rectum	27	22
Right colon	20	8
Left colon	4	1
Transverse colon cancer	0	3
Total colon	1	0
Sigmoid colon	11	7
Low rectum	18	6
High rectum	6	9
Middle rectum	3	7
Degree of tumor differentiation (n)		1.279	0.528
Well differentiation	20	13
Moderate differentiation	36	26
Low differentiation	7	2
T stage (n)		0.811	0.667
T1	0	0
T2	4	2
T3	52	32
T4	7	7
Lymph node metastasis (n)		0.633	0.426
N0	35	26
N1	28	15
N2	0	0
TNM stage (n)		3.195	0.362
IIA	32	20
IIB	3	6
IIIA	4	2
IIIB	24	13

TNM: Tumor-node-metastasis.