Exact 95% confidence interval and McNemar's test of endoscopic transpapillary biopsy (ETP) and intraductal ultrasonography (IDUS) with respect to localisation of biliary stenoses
| Method | Stenosis (localisation) | Accuracy (No of patients) | Accuracy (%) | Lower margin (%) | Upper margin (%) |
|---|---|---|---|---|---|
| Mc Nemar's test: *p=0.022 versus ETP in distal stenoses; †p=0.008 versus ETP in all stenoses. | |||||
| ETP | Proximal | 9/12 | 75 | 42.8 | 94.5 |
| Middle | 7/7 | 100 | 42.1 | 100 | |
| Distal | 22/41 | 53.7 | 28.5 | 60.3 | |
| All | 36/60 | 60 | 41.6 | 67.9 | |
| IDUS | Proximal | 12/12 | 100 | 73.5 | 100 |
| Middle | 7/7 | 100 | 42.1 | 100 | |
| Distal | 31/41 | 75.6 | 54.4 | 83.9* | |
| All | 50/60 | 83.3 | 65.8 | 87.9† | |