Table 1.

Demographic characteristics for CRC by colon versus rectum; incident cases, January 1994 to December 2003 (all P < 0.0001; except gender for colon P < 0.01)

Colon (n = 90,273), n (%)Rectum (n = 37,532), n (%)Total (N = 127,805), n (%)
Gender
    Male44,753 (49.6)21,198 (56.5)65,951 (51.6)
    Female45,520 (50.4)16,334 (43.5)61,854 (48.4)
Stage
    I21,280 (23.6)13,606 (36.3)34,886 (27.3)
    IIA22,812 (25.3)6,880 (18.3)29,692 (23.2)
    IIB5,278 (5.9)1,761 (4.7)7,039 (5.5)
    IIIA1,769 (2.0)1,121 (3.0)2,890 (2.3)
    IIIB11,949 (13.2)3,582 (9.5)15,531 (12.2)
    IIIC6,665 (7.4)2,585 (6.9)9,250 (7.2)
    IV15,509 (17.2)5,576 (14.9)21,085 (16.5)
Histologic subtype
    Adenocarcinoma78,275 (86.7)32,592 (86.8)110,867 (86.7)
    Mucinous adenocarcinoma9,922 (11.0)2,304 (6.1)12,226 (10.0)
    Other2,076 (2.3)2,636 (7.0)4,712 (3.7)
Colon site
    Proximal and transverse53,907 (59.7)53,907 (42.2)
    Descending5,855 (6.5)5,855 (4.6)
    Sigmoid30,511 (33.8)30,511 (23.9)
    Rectosigmoid12,263 (32.7)12,263 (9.6)
    Rectum25,269 (67.3)25,269 (19.8)
Age category
    0-391,709 (1.9)1,147 (3.0)2,856 (2.2)
    40-494,624 (5.1)3,138 (8.4)7,762 (6.1)
    50-5911,193 (12.4)6,688 (17.8)17,881 (14.0)
    60-6919,978 (22.1)9,345 (24.9)29,323 (22.9)
    70+52,769 (58.5)17,214 (45.9)69,983 (54.8)
Histologic grade
    Well differentiated8,505 (10.9)3,299 (10.9)11,804 (9.2)
    Moderately differentiated52,377 (66.8)21,581 (71.1)73,958 (57.9)
    Poorly differentiated16,836 (21.5)5,250 (17.3)22,086 (17.3)
    Undifferentiated/anaplastic666 (0.9)219 (0.7)885 (0.69)
Race
    White65,558 (72.6)26,181 (69.8)91,739 (71.8)
    Black6,479 (7.2)2,056 (5.5)8,535 (6.7)
    Hispanic9,945 (11.0)4,998 (13.3)14,943 (11.7)
    Chinese2,504 (2.8)1,060 (2.8)3,564 (2.8)
    Non-Chinese Asian5,099 (5.7)2,851 (7.6)7,950 (6.2)
    Other688 (0.8)386 (1.0)1,074 (0.84)
SES
    Lowest11,943 (13.2)5,297 (14.1)17,240 (13.5)
    Second lowest17,040 (18.9)7,288 (19.4)24,328 (19.0)
    Middle19,809 (21.9)8,188 (21.8)27,997 (21.9)
    High20,376 (22.6)8,338 (22.2)28,714 (22.5)
    Highest21,105 (23.4)8,421 (22.4)29,526 (23.1)