| No. of procedures (%) | LGD | HGD | ACA | AD | P value for difference |
|---|---|---|---|---|---|
| PC used | 14/106 (13.2%) | 6/106 (5.7%) | 0 | 6/106 (5.7%) | All grades,P < 0.00001 AD, p = 0.0035 |
| PC not used | 9/261 (3.4%) | 1/261 (0.4%) | 1/261 (0.4%) | 2/261 (0.8%) | |
| SP followed | 14/116 (12%) | 6/116 (5.2%) | 0 | 6/116 (5.2%) | All grades,P < 0.00001 AD, p = 0.0076 |
| SP not followed | 9/251 (3.6%) | 1/251 (0.4%) | 1/251 (0.4%) | 2/251 (0.8%) | |