Site, morphology, site, access scoring system
| Factor | Benchmarks | Points |
|---|---|---|
| Size | <1 cm | 1 |
| 1–1.9 cm | 3 | |
| 2–2.9 cm | 5 | |
| 3–3.9 cm | 7 | |
| >4 cm | 9 | |
| Morphology | Pedunculated | 1 |
| Sessile | 2 | |
| Flat | 3 | |
| Site | Left colon | 1 |
| Right colon | 2 | |
| Access | Easy | 1 |
| Difficult | 3 |
Four polyp levels (with increasing level of complexity) were identified—Level 1 (4–5), Level 2 (6–9), Level 3 (10–12) and Level 4 (>12).