Anatomic site distribution of colon cancer by race and other colon cancer risk factors.
OBJECTIVE
Black patients with colon cancer are more likely to have poorer survival from colon cancer than are white patients. To determine whether anatomic site differences might contribute to survival differences, we compared anatomic site distributions of black and white patients.


METHODS
As part of the Black/White Cancer Survival Study, we collected medical record data for 1,045 patients from Atlanta, New Orleans, and San Francisco/Oakland, newly diagnosed in 1985 or 1986 and interviewed 745 of them.


RESULTS
In polychotomous logistic regression analysis, site was related to stage, grade, and histologic type and among women with age, parity, and possibly smoking. However, it was not related to race, except perhaps among men age 65 and older, among whom blacks were somewhat likely to have more transverse and distal, not proximal, cancer. These relations were consistent across subgroups and were independent of other factors examined.


CONCLUSIONS
Results suggest that site differences are unlikely to contribute to poorer survival commonly observed among black colon cancer patients in the United States.
Coates
R J
RJ
Epidemiology Division, Emory School of Public Health, Atlanta, Georgia 30322.
Greenberg
R S
RS
Liu
M T
MT
Correa
P
P
Harlan
L C
LC
Reynolds
P
P
Fenoglio-Preiser
C M
CM
Haynes
M A
MA
Hankey
B F
BF
Hunter
C P
CP
D000328:Adult; D000367:Age Factors; D000368:Aged; D044383:Black People; D003110:Colonic Neoplasms / Q000208:ethnology* / Q000401:mortality / Q000473:pathology*; D004032:Diet; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D012307:Risk Factors; D012737:Sex Factors; D015996:Survival Rate; D044465:White People