Table 1. Clinicopathological characteristics of the patients.

Features	MSI-H	MSS	Total	P value
Total	29	907	936
Gender				0.022
Male	10	514	524
Female	19	393	412
Age (years old)				0.007
≦69	9	516	525
≧70	20	391	411
Location				<0.0001
Right a	24	220	244
Left b	5	687	692
Histology				<0.0001
wel/mod c	16	845	861
muc/por d	13	62	75
UICC classification				0.57
Stage 0- II	15	411	426
Stage III- IV	14	496	510
Type 2 diabetes mellitus				0.0007
−	28	633	661
+	1	274	275
Body mass index				0.65
<25.00 kg/m2	21	698	719
≧25.00 kg/m2	8	209	217
KRAS gene				<0.0001
Wild type	29	630	659
Mutant type	0	277	277
BRAF gene				<0.0001
Wild type	7	880	887
Mutant type	22	27	49

^a Right: Cecum, Ascending colon, and Transverse colon

^b Left: Descending colon, Sigmoid colon, Rectosigmoid colon, and Rectum

^c wel: well differentiated adenocarcinoma; mod: moderately differentiated adenocarcinoma

^d muc: mucinous carcinoma; por: poorly differentiated adenocarcinoma