Table 1. Summary of the demographic and clinical characteristics of individuals included in the study.
| Characteristics | Cases (N = 1,326) | Controls (N = 1,252) | P-value |
|---|---|---|---|
| Mean age, y (SD) | 60.35 (5.38) | 59.65 (5.64) | 0.001 |
| Male, n (%) | 905 (68.3) | 509 (40.7) | 0.0001 |
| Female, n (%) | 421 (31.7) | 743 (59.3) | |
| Mean adenomas, n | 4.2 | - | |
| ≥ 3 adenomas, n (%)* | 788 (59.4) | - | |
| Adenoma ≥ 1 mm in size, n (%)* | 735 (55.4) | - | |
| Adenoma with villous histology, n (%)* | 831 (62.7) | - | |
| Adenoma with high grade dysplasia, n (%)* | 198 (15) | - |
*One patient may have more than one characteristic. N. number; y, years; SD, standard deviation.