Basic Study
Copyright ©The Author(s) 2021.
World J Gastrointest Oncol. Dec 15, 2021; 13(12): 2101-2113
Published online Dec 15, 2021. doi: 10.4251/wjgo.v13.i12.2101
Table 2 Microsatellite instability status in the Filipinos colorectal cancer patients
Normal tissue (%)
Tumor tissue (%)
Normal/tumor (%)

MSI-H
MSI-L
MSS
P value
MSI-H
MSI-L
MSS
P value
H/H
L/L
S/S
L/S or S/L
L/H or H/L
P value

Freq
25
23
6

27
17
10

19
8
3
10
14

Gender
Male3012 (40)15 (50)3 (10)NS14 (47)9 (30)7 (23)NS9 (30)4 (13)1 (3)8 (27)8 (27)NS
Female2413 (54)8 (33)3 (13)13 (54)8 (33)3 (13)10 (42)4 (17)2 (8)2 (8)6 (25)
Age
≤ 4053 (60)2 (40)0 (0)NS2 (40)1 (20)2 (40)NS2 (40)0 (0)0 (0)2 (40)1 (20)NS
> 404922 (45)21 (43)6 (12)25 (51)16 (33)8 (16)17 (35)8 (16)3 (6)8 (16)13 (27)
Location of tumor
Proximal64 (67)2 (33)0 (0)NS4 (67)2 (33)0 (0)NS4 (67)2 (33)0 (0)0 (0)0 (0)NS
Distal/rectum4821 (44)21 (44)6 (12)23 (48)15 (31)10 (21)15 (31)6 (13)3 (6)10 (21)14 (29)
Tumor grade
Poor85 (62)3 (38)0 (0)NS5 (63)2 (25)1 (12)NS4 (50)1 (13)0 (0)1 (13)2 (25)NS
Moderate4419 (43)19 (43)6 (14)21 (48)15 (34)8 (18)14 (32)7 (16)3 (7)8 (18)12 (27)
Well21 (50)1 (50)0 (0)1 (50)0 (0)1 (50)1 (50)0 (0)0 (0)1 (50)0 (0)NS
Tumor stage
I-II209 (45)9 (45)2 (10)NS8 (40)10 (50)2 (10)NS7 (35)6 (30)0 (0)4 (20)3 (15)NS
III-IV3416 (47)14 (41)4 (12)19 (56)7 (21)8 (23)12 (35)2 (6)3 (9)6 (18)11(32)