Table 1.

Influence of Surgical Training on Duration of Surgical Steps in Endoscopic Tympanoplasty

Surgical Step	Number of Cases with Teaching	Teaching Median (min)	No Teaching Median (min)	Median Teaching-Median no Teaching (min)	P (Wilcoxon)
Debriding ear canal	1	6.2	1.3	5	0.0971
Injecting anesthesia	14	3.2	1.2	2	<.0001
Hair trimming	15	4.5	1.4	3.2	<.0001
Stripping edges of perforation	4	8.0	3.2	4.9	.0058
Raising the tympanomeatal skin flap	19	27.3	9.8	17.5	<.0001
Preparing non-autogenous graft	0	N/A	2.0	N/A	.0253
Placing graft & replacing flap	15	22.1	9.1	13	<.0001
Packing ear canal	7	4.6	2.2	2.3	.0018
Total surgical time	20	64.8	32.0	32.8	<.0001