Table 1.

Characteristics of non-Hispanic White and non-Hispanic Black patients with colon adenocarcinoma in the DoD military health system (N = 2,537)

Non-Hispanic White (n = 2,028)Non-Hispanic Black (n = 509)
CharacteristicN (%)N (%)Pa
Age at diagnosis, years
 <50286 (14)122 (24)<0.01
 50–54204 (10)66 (13)
 55–59259 (13)65 (13)
 60–64373 (18)93 (18)
 65–69230 (11)67 (13)
 70–74228 (11)45 (9)
 75–79196 (10)30 (6)
 80+252 (12)21 (4)
Sex0.86
 Men1,244 (61)310 (61)
 Women784 (39)199 (39)
Marital status at diagnosis0.03
 Never married57 (3)26 (5)
 Married1,552 (77)378 (74)
 Other334 (16)90 (18)
 Unknown85 (4)15 (3)
Active duty status at diagnosis<0.01
 No1,876 (93)443 (87)
 Yes152 (7)66 (13)
Service branchb<0.01
 Army660 (33)254 (50)
 Air force683 (34)130 (26)
 Marines86 (4)19 (4)
 Navy469 (23)80 (16)
 Other22 (1)4 (1)
 Unknown108 (5)22 (4)
Rankb<0.01
 Enlisted950 (47)336 (66)
 Officer437 (22)35 (7)
 Other/unknown641 (32)138 (27)
Tumor stage<0.01
 Localized798 (39)174 (34)
 Regional856 (42)210 (41)
 Distant352 (17)122 (24)
 Unknown22 (1)3 (1)
Tumor grade0.34
 Well differentiated319 (16)67 (13)
 Moderately differentiated1,283 (63)338 (66)
 Poorly differentiated287 (14)65 (13)
 Unknown139 (7)39 (8)
Colon cancer site<0.01
 Cecum433 (21)115 (23)
 Ascending colon398 (20)95 (19)
 Hepactic flexure101 (5)25 (5)
 Transverse colon163 (8)47 (9)
 Splenic flexure67 (3)34 (7)
 Descending colon130 (6)51 (10)
 Sigmoid colon686 (34)129 (25)
 Unknown/colon, NOS50 (2)13 (3)
Comorbiditiesc0.18
 None1,205 (59)325 (64)
 One272 (13)63 (12)
 Two or more551 (27)121 (24)
  • aTwo-sided P value.

  • bService branch or rank of active duty member or sponsor.

  • cCharlson comorbidity index. Colon cancer was not included in calculation.