Table 1. Demographic characteristics of the NCI-University of Maryland colorectal cancer case control study participants.
| Characteristics | Cases | Population Controls | Hospital Controls | Total Controls |
| n | 245 | 236 | 210 | 446 |
| Age ± SD | 64.7±11.7 | 66.8±9.7 | 63.1±12.1 | 65.0±11.0 |
| Gender (%) | ||||
| Male | 185 (75)1 | 115 (48) | 97 (46) | 212 (48) |
| Female | 60 (25) | 121 (51) | 113 (54) | 234 (52) |
| Race (%) | ||||
| African American | 97 (40) | 121 (51) | 69 (33) | 190 (43) |
| Caucasian | 148 (60) | 115 (49) | 141 (67) | 256 (57) |
| Stage (%) | ||||
| Unknown | 4 (31) | |||
| I | 38 (16) | |||
| II | 69 (29) | |||
| III | 79 (33) | |||
| IV | 51 (21) | |||
| Survival Time (months) | ||||
| Median, range | 50.5 (43.2–56.4) | |||
1
Statistically significant; p-value<0.05 vs. each control group.