Table 2.

Comparison of the procedure completion times and degree of difficulty between the two groups.

Completion time (seconds)				Numeric rating scale#
Mean ± SD		p ∗	95% CI	Mean ± SD	p ∗∗
METI	18.31 ± 2.46	0.001	0.94–2.46	2.45 ± 0.76	0.001
CETI	20.01 ± 1.95			4.20 ± 0.83

^∗Student's t-test; ^∗∗Wilcoxon rank sum test.