Table 1.
Prevalence of colorectal adenoma by demographic characteristics and risk factors among 143 participants in the IRAS cohort study (1992-1994 to 2002-2004).
| Characteristics | Adenoma/All (% of all) | P for χ2 test | |
|---|---|---|---|
| Study population | 24/119 (16.8) | N /A | |
| Gender | Males | 11/66 (16.7) | 1.0 |
| Females | 13/77 (16.9) | ||
| Age at 1992-1994 (y) | 50-59 | 8/53 (15.1) | 0.5 |
| 60-69 | 8/55 (14.6) | ||
| 70-80 | 8/25 (22.9) | ||
| Center | Los Angeles, CA | 4/26 (15.4) | 0.7 |
| Oakland, CA | 7/30 (23.3) | ||
| San Antonio, TX | 5/38 (13.2) | ||
| San Luis Valley, CO | 8/49 (16.3) | ||
| Race/Ethnicity | Non-Hispanic White | 7/59 (11.9) | 0.4 |
| Black | 7/34 (20.6) | ||
| Hispanic | 10/50 (20.0) | ||
| BMI at 1992-1994 | Normal (<25) | 5/56 (8.9) | 0.1 |
| Overweight (25-30) | 13/53 (24.5) | ||
| Obese (>30) | 6/33 (18.2) | ||
| Missing | 1 | ||
| Smoking status at 1992-1994 | Never | 9/62 (14.5) | 0.5 |
| Former | 13/63 (20.6) | ||
| Current | 2 /18 (11.1) | ||
| Previous polyps | No | 19/130 (14.6) | 0.04 (Fisher exact test) |
| Yes | 5 /13 (38.5) | ||