Table 1.

Case and control demographics for the colorectal adenoma and colorectal cancer case-control studies

Colorectal cancer study
Colorectal adenoma study
ControlsCasesControlsCases
Total, n742500296317
Sex, n (%)
    Male408 (55.0)300 (60.0)174 (58.8)226 (71.3)
    Female334 (45.0)200 (40.0)122 (41.2)91 (28.7)
Mean age (SD)67.9 (8.8)67.3 (8.4)62.0 (5.6)62.5 (5.7)
    Male68.2 (8.4)66.7 (8.3)62.0 (5.5)62.7 (5.8)
    Female67.5 (9.3)68.2 (8.5)62.0 (5.8)62.2 (5.7)
Site (primary for cancer), n (%)
    Colon only286 (57.2)223 (75.1)
    Rectum only214 (42.8)46 (15.5)
    Colon and rectum28 (9.4)