Working group response using Delphi technique
| Question | Average score Score 1–5 (1 strongly disagree; 5 strongly agree) | SD |
|---|---|---|
| Do you feel site, size and morphology of a polyp is useful to help define the level of difficulty? | 4.75 | 0.46 |
| Level I | ||
| Should level I polyps be <1 cm in size? | 4.50 | 0.53 |
| Can level I polyps be right or left sided? | 3.38 | 1.60 |
| Level II | ||
| Left-sided lesions | ||
| Should level II polyps include pedunculated lesions <3 cm in size? | 3.44 | 1.51 |
| Should level II polyps include sessile lesions <2 cm in size? | 3.44 | 1.42 |
| Right-sided lesions | ||
| Should level II polyps include pedunculated and sessile lesions <2 cm | 2.67 | 1.58 |
| Level III | ||
| Left-sided lesions | ||
| Should level III polyps include pedunculated lesions >3 cm in size? | 3.63 | 1.69 |
| Should level III polyps include sessile lesions >2 cm in size? | 3.75 | 1.28 |
| Right-sided lesions | ||
| Should level III polyps include pedunculated and sessile lesions >2 cm | 3.63 | 1.41 |
| Level IV | ||
| Should level IV polyps include any lesion >5 cm? | 4.44 | 1.01 |
| Any polyp with difficult access (clamshell distribution, peri-appendicular, peri-diverticular, extending into I-C valve)? | 4.56 | 0.53 |
| Should level IV polyps include all laterally spreading tumours >3 cm? | 3.89 | 1.54 |
| Should level IV include residual polyps on scars? | 3.78 | 1.48 |