Patient baseline characteristics and details of their largest lesion by adenoma and SSA/P groups
| Adenoma ≥20 mm | SSA/P ≥20 mm | p Value | |
|---|---|---|---|
| Variable | Patients: 1425 | Patients: 246 | |
| Age | 68.2±10.6 | 65.6±12.7 | <0.001 |
| Age | |||
| ≥70 years | 47.9% | 30.5% | |
| Sex | |||
| Female | 44.5% | 58.2% | <0.001 |
| Size | <0.001 | ||
| Mean±SD | 38.0±16.4 | 29.6±10.0 | <0.001 |
| Median (IQR) | 35 (25–45) | 30 (20–35) | |
| Size group | |||
| ≤25 mm | 28.7% | 49.5% | |
| 26–35 mm | 27.1% | 30.0% | |
| >35 mm | 44.2% | 20.5% | |
| Location | <0.001 | ||
| Rectum | 22.5% | 3.2% | |
| Sigmoid, descending and splenic flexure | 16.7% | 11.6% | |
| Transverse colon and hepatic flexure | 16.2% | 26.8% | |
| Ascending colon | 20.8% | 37.9% | |
| Cecum | 23.7% | 20.5% | |
| Previously attempted | 13.9% | 9.9% | 0.100 |
| Histology | NE | ||
| No dysplasia (SSA/P-ND) | – | 66.1% | |
| Low-grade dysplasia | 71.5% | 27.6% | |
| High-grade dysplasia | 24.8% | 3.5% | |
| Invasive cancer | 3.7% | 2.8% | |
| Paris 0-Is (sessile) component | 50.2% | 17.9% | <0.001 |
| Submucosal fibrosis | 26.3% | 12.7% | <0.001 |
| Non-lifting sign | 8.4% | 3.2% | 0.013 |
| Easy access and position | 62.7% | 70.7% | 0.054 |
| Piecemeal resection (not en bloc) | 85.5% | 76.7% | 0.002 |
| Additional modality | 0.040 | ||
| None | 72.1% | 80.4% | |
| Argon plasma coagulation | 6.6% | 3.2% | |
| Other | 21.3% | 16.4% | |
| Incomplete snare excision | 17.4% | 9.5% | 0.006 |
| EMR duration (minutes) | <0.001 | ||
| Mean±SD | 25.6±21.1 | 14.6±10.7 | |
| Median (IQR) | 20.0 (10.0–30.7) | 10.0 (5.0–20.0) | |
EMR, endoscopic mucosal resection; NE, non evaluable; SSA/P, sessile serrated adenoma/polyp; SSA/P-ND, sessile serrated adenoma/polyp, no cytological dysplasia.