UK Joint Advisory Group for GI endoscopy (JAG) accreditation status, Global Rating Scale and aMNP
| JAG accreditation status | Units (%) | Unit median aMNP* | IQR | Unit mean aMNP* | SD |
| Accredited | 144 (47%) | 65.5 | 51.3–80.2 | 65.6 | 25.3 |
| Assessed: improvements required | 40 (13%) | 61.0 | 49.2–80.2 | 63.9 | 26.3 |
| Not assessed/undergoing assessment | 105 (34%) | 53.1 | 38.6–70.2 | 54.1 | 26.7 |
| Not awarded | 16 (5%) | 67.4 | 61.3–76.1 | 74.0 | 31.2 |
| Global Rating Scale scores | |||||
| A and B (pass) | 246 (82%) | 63.5 | 48.8–78.3 | 64.2 | 26.3 |
| C and D (fail) | 55 (18%) | 55.2 | 38.8–67.6 | 53.5 | 26.5 |
*Adjusted mean number of polyps detected per 100 procedures.
aMNP, adjusted mean number of polyps.