A video of ERCP procedure has been viewed to the patients who will undergo ERCP and questions about the procedure had been answered by the primary investigator (experienced endoscopy nurse)

Patients arranged ERCP for any reason underwent directly to the ERCP without any video education.

Procedure was presented to the cases via a video showing the steps in ERCP and questions had been answered by an experienced nurse

This will be measured with Stait Trait Anxiety Inventory. There are 2 subscales within this measure. The State Anxiety Scale (S-Anxiety) evaluates the current state of anxiety, asking how respondents feel "right now," using items that measure subjective feelings of apprehension, tension, nervousness, worry, and activation/arousal of the autonomic nervous system. The Trait Anxiety Scale (T-Anxiety) evaluates relatively stable aspects of "anxiety proneness," including general states of calmness, confidence, and security.

The STAI has 40 items, 20 items allocated to each of the subscales. Responses for the S-Anxiety scale assess intensity of current feelings "at this moment": 1) not at all, 2) somewhat, 3) moderately so, and 4) very much so. Responses for the T-Anxiety scale assess frequency of feelings "in general": 1) almost never, 2) sometimes, 3) often, and 4) almost always.

Range of scores for each subtest is 20-80, the higher score indicating greater anxiety.

A VAS for satisfaction is a horizontal line of 100-mm long. At the beginning and at the end, there are two descriptors representing extremes of satisfaction (i.e. no satisfaction and extreme satisfaction). The patient rated his satisfaction by making a vertical mark on the 100-mm line. The measurement in millimetres was converted to the same number of points ranging from 0 to 100 points.