Table 2. Baseline Characteristics of the Study Population at Index Colonoscopy according to Follow-up.
| Characteristic | LRA group (n=486) | HRA group (n=409) | ||||
|---|---|---|---|---|---|---|
| Follow-up (n=221) | No follow-up (n=265) | P-value | Follow-up (n=178) | No follow-up (n=231) | P-value | |
| Clinical characteristics | ||||||
| Age (yr) | 56.1±9.4 | 56.5±12.2 | 0.649 | 57.3±9.1 | 60.4±9.0 | 0.003 |
| Male sex | 156 (70.6) | 159 (60.0) | 0.015 | 122 (68.5) | 156 (67.5) | 0.829 |
| BMI (kg/m2) | 24.8±3.1 | 24.2±3.2 | 0.064 | 24.9±3.1 | 24.0±3.4 | 0.011 |
| Smoker | 92 (41.6) | 76 (28.7) | 0.003 | 78 (43.8) | 97 (42.0) | 0.208 |
| Family history of CRC | 7 (3.2) | 12 (4.5) | 0.441 | 9 (5.1) | 10 (4.3) | 0.729 |
| Aspirin/NSAID user | 29 (13.1) | 24 (9.1) | 0.152 | 17 (9.6) | 14 (6.1) | 0.186 |
| Pathological characteristics | ||||||
| Number | 1.3±0.5 | 1.2±0.4 | 0.151 | 2.6±1.6 | 2.3±1.7 | 0.045 |
| Size (mm) | 5.9±2.3 | 5.9±1.4 | 0.747 | 11.6±6.7 | 11.5±4.7 | 0.869 |
| Location (proximal) | 123 (55.7) | 112 (42.3) | 0.008 | 88 (49.4) | 114 (49.4) | 0.197 |
| Shape (non-polypoid) | 31 (14.0) | 40 (15.1) | 0.740 | 28 (15.7) | 43 (18.6) | 0.445 |
| Serrated polyp | 33 (14.9) | 44 (16.6) | 0.603 | 33 (18.5) | 44 (19.0) | 0.896 |
Values are presented as mean±SD or number (%).
LRA, low-risk adenoma; HRA, high-risk adenoma; CRC, colorectal cancer.