Retrospective Cohort Study
Copyright ©The Author(s) 2017.
World J Gastroenterol. Feb 28, 2017; 23(8): 1387-1396
Published online Feb 28, 2017. doi: 10.3748/wjg.v23.i8.1387
Table 2 Tumor characteristics1n (%)
Study cohortOlder (age ≥ 80 yr)Younger (age < 80 yr)P value
(n = 350)(n = 175)(n = 175)
Tumor location2
Right colon140 (40)80 (45.7)60 (34.3)0.029
Left colon/rectum210 (60)95 (54.3)115 (65.7)
Histology0.201
NOS260 (76.5)124 (74.2)136 (78.6)
Mucinous64 (18.8)38 (22.8)26 (15)
Signet ring cell11 (3.2)3 (1.8)8 (4.6)
Other5 (1.5)2 (1.2)3 (1.78)
Grade30.025
148 (14.8)17 (10.4)31 (19.3)
2-3276 (85.2)146 (89.3)130 (80.7)
T0.27
T117 (5.2)5 (3.1)12 (7.4)
T257 (17.6)28 (17.4)29 (17.8)
T3237 (73.2)123 (76.4)114 (69.9)
T413 (4)5 (3.1)8 (4.9)
N0.357
N0179 (67)94 (71.2)85 (63)
N156 (21)24 (18.2)32 (23.7)
N232 (12)14 (10.6)18 (13.3)
M172 (20.7)34 (19.8)38 (21.7)0.655
TNM stage0.259
I65 (19)30 (17.7)35 (20.2)
II116 (33.8)66 (38.8)50 (28.9)
III90 (26.2)40 (23.5)50 (28.9 )
IV72 (21)34 (20)38 (22)
LVI18 (6)11 (7.5)7 (4.6)0.296
VVI36 (11.9)15 (10.1)21 (13.6)0.348
Obstruction436 (10.3)22 (12.6)14 (8)0.159
Perforation412 (3.4)10 (5.7)2 (1.1)0.019
Synchronous CRC11 (3.1)4 (2.3)7 (4)0.358
Metachronous CRC2 (0.6)1 (0.6)1 (0.6)0.997
RAS mutated8 (22.2)2 (15.4)6 (26.1)0.458
BRAF mutated1 (3.7)0 (0)1 (7.7)0.29
MSI-H6 (25)3 (100)3 (14.3)0.001