Table 3. Trial details and comparison.

Group/variable	Novice trials (n=36)	Intermediate trials (n=32)	Expert trials (n=30)	Pa	Post-hocb
SP, number	5.00±3.00	7.00±4.75	11.00±5.00	<0.001	A, B, C
DC, fraction	0.83±0.17	0.89±0.17	0.94 ±0.07	<0.001	A, C
AIT, seconds	34.91±20.99	14.22±6.01	11.74±7.21	<0.001	A, C

^a, the result of the comparison between the three groups by a Kruskal-Wallis test; ^b, the result of the pairwise group comparison by a Dunn-Bonferroni post-hoc test. Values are presented as median ± interquartile range. P values were calculated using Kruskal-Wallis test with Dunn-Bonferroni post-hoc test. Number (n) indicates amount of trials. One trial data of intermediate 6 was lost due to system breakdown. All other trials were fully recorded and analyzed. Post-hoc A indicates statistical significance between novice and intermediates. Post-hoc B indicates statistical significance between intermediates and experts. Post-hoc C indicates statistical significance between novice and experts. AIT, average intersegmental time. Average time passed between each segmental visit. DC, diagnostic completeness. Number of visualized segments divided by total number of segments. SP, structured progress. A score from 0–18 points. One point was given every time the operator proceeded from one segment to the immediate succeeding segment.