Table 2. Origin and characteristics of tracheal stenosis.

Parameter	Number	%	Mean	SD
Origin of stenosis	54	100
Post-tracheostomy	39	72
Surgical tracheostomy	35	65
Dilational tracheostomy	4	7
Post intubation	15	28
Distance from the vocal cords to stenosis (cm)			3.5	0.57
2	2	3.7
3	2	3.7
4	6	11
5	7	13
6	14	26
7	13	24
8	7	13
9	3	5.5
Length of stenosis (mm)			8.6	3.94