Relationship between mismatch repair protein, RAS, BRAF, PIK3CA gene expression and clinicopathological characteristics in elderly colorectal cancer patients

Table 2 Relationship between expression of mismatch repair protein and clinicopathological characteristics in elderly colorectal cancer patients

Clinical pathology data	n	MMR		χ2	P value
		dMMR	pMMR
Gender				0.005	0.945
Male	196	19	177
Female	131	13	118
Tumor size				3.907	0.048
≥ 5 cm	112	16	96
< 5 cm	215	16	199
Pathological type				0.456	0.796
Adenocarcinoma	281	27	254
Mucinous adenocarcinoma	43	5	38
Other	3	0	3
Tumor morphology				1.768	0.622
Ulcer type	181	19	162
Raised type	77	9	68
Ulcer raised type	45	3	42
Other	24	1	23
Tumor site				32.368	0.000
Right colon	78	19	59
Left colon	90	11	79
Rectum	159	2	157
Differentiation				8.181	0.085
High	4	1	3
High-moderate	15	1	14
Moderate	241	18	223
Moderate-poor	59	10	49
Poor	8	2	6
Lymph node metastasis				2.003	0.157
Yes	130	9	121
No	197	23	174

MMR: Mismatch repair.