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Procedure related variables
| TOTAL | HOUSE 1 | HOUSE 2 | HOUSE 3 | P | |
|---|---|---|---|---|---|
| n = 1931 | n = 1124 | n = 541 | n = 266 | ||
| Procedure time (min) (mean ± SEM) | 55.9 ± 0.9 | 40 ± 0.7 | 65 ± 1.5 | 106 ± 3.2 | <.0001 |
| Deep bile duct cannulation (%)a | 92.7 | 90.9 | 95.8 | 95.1 | 0.0009 |
| Previous sphincterotomy (%) | 30.4 | 22.3 | 42.5 | 39.5 | <.0001 |
| Advanced procedures (%) | 7.7 | 1.0 | 3.1 | 45.5 | <.0001 |
a136 excluded where the bile duct was not intended to cannulate
