Statistical analysis
Descriptive statistics included: frequency statistics for patient and procedural characteristics and procedure completion rates (completion rates reported separately for cases with and without crossover to a reusable duodenoscope); median and range for overall satisfaction and procedure duration; and mean (SD) and range for age and mean number of cannulation attempts. Endoscopist experience and ASGE complexity grades were assessed for completion time and performance ratings using Wilcoxon rank-sum tests, and for number of cannulation attempts using a negative binomial model. Fisher’s exact test was used to compare the occurrence of crossover to a reusable duodenoscope by level of experience or by ASGE case complexity level. For binary data, 95 %CIs were calculated using the Clopper–Pearson exact methods. Statistical analyses were performed using SAS 9.4 software (SAS Institute Inc., Cary, North Carolina, USA).