Table I.
Selected characteristics of the study population
| CRCa | High-risk polypb | Low-risk polypc | Controld | |
| N (%) | N (%) | N (%) | N (%) | |
| Age (years) | ||||
| ≤50 | 8 (1.5) | 45 (8.3) | 135 (24.9) | 354 (65.3) |
| 51–60 | 18 (2.4) | 63 (8.4) | 238 (31.7) | 433 (57.6) |
| 61–70 | 24 (2.2) | 115 (10.6) | 372 (34.2) | 576 (53.0) |
| 71–80 | 34 (4.3) | 80 (10.2) | 258 (32.8) | 414 (52.7) |
| ≥80 | 6 (14.3) | 2 (4.8) | 14 (33.3) | 20 (47.6) |
| Total | 90 (100) | 305 (100) | 1017 (100) | 1797 (100) |
| Mean (95% CI) | 66.8 (45.8–87.7) | 62.9 (43.2–82.7) | 63.2 (43.2–83.2) | 61.3 (39.4–83.3) |
| Sex | ||||
| Male | 58 (3.3) | 205 (11.6) | 663 (37.5) | 841 (47.6) |
| Female | 32 (2.2) | 101 (7.0) | 354 (24.5) | 957 (66.3) |
| Total | 90 (100) | 306 (100) | 1017 (100) | 1798 (100) |
| Education | ||||
| Elementary | 52 (3.2) | 155 (9.5) | 552 (33.7) | 879 (53.7) |
| Secondary modern | 28 (2.3) | 120 (9.9) | 359 (29.6) | 707 (58.2) |
| Matura | 5 (2.5) | 13 (6.6) | 56 (28.4) | 123 (62.4) |
| University | 3 (6.5) | 5 (10.9) | 15 (32.6) | 23 (50.0) |
| Total | 88 (100) | 293 (100) | 982 (100) | 1732 (100) |
| Smoking | ||||
| Current | 13 (2.6) | 56 (11.0) | 198 (39.0) | 241 (47.4) |
| Former | 37 (4.0) | 93 (10.1) | 310 (33.6) | 483 (52.3) |
| Never | 40 (2.3) | 148 (8.7) | 489 (28.7) | 1029 (60.3) |
| Total | 90 (100) | 297 (100) | 997 (100) | 1753 (100) |
a
CRC cases.
b
Adenomatous villous, tubulovillous and villous + tubulovillous polyps.
c
Adenomatous tubular and hyperplastic polyps.
d
Polyp-free controls.