Table 1.
Baseline characteristics of included patients with low-grade dysplasia
| Characteristic | IBD patients with serrated polyp (n = 198) | IBD patients without serrated polyp (n = 423) |
|---|---|---|
| Male, n (%) | 102 (51.5%) | 177 (41.8) |
| Disease | ||
| Ulcerative colitis, n (%) | 126 (63.6) | 206 (49.2) |
| Crohn's disease, n (%) | 65 (32.8) | 208 (48.7) |
| IBD-unclassified, n (%) | 7 (3.5) | 9 (2.1) |
| Age at IBD diagnosis in years (± SD) | 37.0 (14.5) | 26.9 (10.4) |
| Follow-up after IBD diagnosis in years, mean (± SD) | 22.2 (13.6) | 21.3 (10.6) |
| Years between consecutive colonoscopies, mean (± SD) | 3.0 (1.7) | 3.3 (2.0) |
| Mean inflammation score (± SD) | 0.56 (0.47) | 0.50 (0.49) |
| Family history of CRC (%) | 28 (14) | 60 (14) |
| Serrated polyps | – | |
| Hyperplastic polyp | 91 | |
| Sessile serrated lesion with dysplasia | 13 | |
| Sessile serrated lesion without dysplasia | 89 | |
| Traditional serrated adenoma | 5 | |
| Age at serrated polyp, mean (± SD) | 54.8 (12.0) | – |
| Follow-up after index serrated polyp in years, median (IQR) | 3.0 (0–5.8) | – |
IBD = inflammatory bowel disease, CRC = colorectal cancer, SD = standard deviation, IQR = interquartile range