Table 1.
Age-standardized characteristics of the study population at the questionnaire cycle prior to first lower endoscopy since study enrollment, according to colorectal adenoma occurrence.
| Colorectal adenoma case | ||
|---|---|---|
| No (n=32,484) |
Yes (n=1,913) |
|
|
| ||
| Age | 51.3 (8.5) | 52.2 (7.3) |
| Family history of colorectal cancer, % | 12 | 20 |
| Body mass index, kg/m2 | 30.3 (6.8) | 30.2 (6.9) |
| Current smoking status | ||
| Never smoker, % | 61 | 57 |
| Past smoker, % | 26 | 29 |
| Current smoker, % | 12 | 14 |
| Alcohol consumption | ||
| Non-drinker, % | 62 | 66 |
| Current drinker, 1–6 drinks/week, % | 26 | 25 |
| Current drinker, ≥7 drinks/week, % | 4 | 6 |
| Vigorous exercise | ||
| None, % | 43 | 48 |
| <5 hours/week, % | 37 | 39 |
| ≥5 hours/week, % | 7 | 7 |
| Red meat consumption | ||
| Quartile 1 (low consumption), % | 24 | 22 |
| Quartile 2, % | 23 | 24 |
| Quartile 3, % | 23 | 25 |
| Quartile 4 (high consumption), % | 24 | 25 |
| Type 2 diabetes, % | 13 | 10 |
| Ever menopausal hormone use, % | 32 | 35 |
| Ideal cardiovascular health | ||
| Poor, % | 19 | 17 |
| Intermediate, % | 57 | 58 |
| Ideal, % | 15 | 18 |
Values are means (SD) or percentages and are standardized to the age distribution of the study population.