Table 1.
Characteristics of screening cohort younger than 50 years.
| Screening negative (N = 17,169) | CRA (N = 118) | Cancer (N = 6) | Total screening participants (N = 17,293) | |
|---|---|---|---|---|
| Age (year), mean(SD) | 47.82 (2.60) | 48.09 (1.59) | 47.17 (4.49) | 47.82 (2.60) |
| Height (cm), mean(SD) | 163.83 (13.90) | 166.06 (7.17) | 164.67(7.53) | 163.84 (13.86) |
| Sex | ||||
| Male | 7,395 (43.07) | 78 (66.10) | 3 (50.00) | 7,476 (43.23) |
| BMI (kg/m2), mean(SD) | 23.81 (2.85) | 24.57 (2.91) | 24.17 (3.80) | 23.81 (2.85) |
| Marital status | ||||
| Married | 16,612 (96.94) | 117 (99.15) | 5 (83.33) | 16,734 (96.95) |
| Unmarried | 127 (0.74) | 0 (0.00) | 0 (0.00) | 127 (0.73) |
| Divorced | 271 (1.58) | 1 (0.85) | 0 (0.00) | 272 (1.58) |
| Widowed | 127 (0.74) | 0 (0.00) | 1 (16.67) | 128 (0.74) |
| Education | ||||
| Illiterate/Primary school | 4,014 (23.38) | 19 (16.10) | 3 (50.00) | 4,036 (23.34) |
| Middle school | 12,424 (72.36) | 96 (81.36) | 1 (16.67) | 12,521 (72.40) |
| College/University | 731 (4.26) | 3 (2.54) | 2 (33.33) | 736 (4.26) |
| Family history of colorectal cancer | 532 (3.11) | 16 (13.56) | 1 (16.67) | 549 (3.18) |
| History of diabetes | 776 (4.52) | 5 (4.24) | 0 (0.00) | 781 (4.52) |
| Smoking | ||||
| Nonsmoker | 11,842 (68.98) | 57 (48.31) | 5 (83.33) | 11,904 (68.84) |
| Former smoker | 341 (1.99) | 3 (2.54) | 0 (0.00) | 344 (1.99) |
| Current smoker | 4,985 (29.03) | 58 (49.15) | 1 (16.67) | 5,044 (29.17) |
| Alcohol a | ||||
| Nondrinker | 13,756 (80.16) | 80 (67.80) | 4 (66.67) | 13,840 (80.07) |
| Light drinker | 474 (2.76) | 2 (1.69) | 0 (0.00) | 476 (2.75) |
| Drinker | 2,931 (17.08) | 36 (30.51) | 2 (33.33) | 2,969 (17.18) |
| FIT | ||||
| Positive | 2,826 (16.45) | 118 (100.00) | 6 (100.00) | 2,950 (17.06) |
| Colonoscopy compliance b | 750 (26.54) | 118 (100.00) | 6 (100.00) | 874 (29.63) |
BMI, body mass index; CRA, colorectal adenoma; FIT, fecal immunochemical test; SD, standard deviation.
a
Alcohol drinking was classified as nondrinker, light drinker (<1 time per month for more than 6 months), and drinker (≥1 time per month for more than 6 months).
b
Colonoscopy compliance means the participation rate of colonoscopy among those with positive FIT results.