Table 1.

Clinicopathological and molecular features of colorectal cancer patients in study

VariableBlacksWhites
Test cohortStage III validation cohort
N = 106 (%)N = 36 (%)N = 239 (%)
Age group (years)
 <6552 (49)13 (36)117 (49)
 ≥6554 (51)23 (64)122 (51)
Gender
 Female71 (67)18 (50)104 (44)
 Male35 (33)18 (50)135 (56)
Tumor location
 Proximal colon28 (26)19 (53)114 (48)
 Distal colon69 (65)12 (33)69 (29)
 Rectum9 (9)5 (14)56 (23)
Depth of tumor invasion
 pT00 (0)0 (0)0 (0)
 pT14 (4)0 (0)8 (3)
 pT211(10)2 (6)29 (12)
 pT373 (69)27 (75)165 (69)
 pT418 (17)7 (19)37 (15)
Nodal statusa
 N057 (54)0 (0)132 (55)
 N1-349 (46)36 (100)97 (41)
Distant metastasisb
 M089 (85)36 (100)199 (83)
 M116 (15)0 (0)40 (17)
Tumor stage
 I9 (9)29 (12)
 II46 (43)100 (42)
 III35 (33)36 (100)71 (30)
 IV16 (15)39 (16)
Tumor grade
 Low86 (81)31 (86)185 (78)
 High20 (19)5 (14)53 (22)
Tumor size (cm)c
 ≤566 (62)18 (50)152 (64)
 >540 (38)16 (44)87 (36)

NOTE: N, total number of cases; %, percentage of N.

  • aInformation missing for 10 white cases.

  • bInformation missing for 1 black case (test).

  • cInformation missing for 2 black cases (validation).