Table 2. Classification of DISE findings

Level	Degree of obstruction*	Configuration^†
Level	Degree of obstruction*	AP diameter	Lat. diameter	Contributing structure
Retropalatal	0/1/2	Palate	LPW	Tonsil
Retropalatal	0/1/2	+/–	+/–	+/–
Retrolingual	0/1/2	Tongue base	LPW	Epiglottis
Retrolingual	0/1/2	+/–	+/–	+/–

Degree of obstruction has one number of each structure: 0=no obstruction (no vibration), 1=partial obstruction (vibration, 50%–75%), 2=complete obstruction (collapse, >75%).
Dichotomous configuration noted for structures with degree of obstruction greater than 0.
DISE: drug-induced sleep endoscopy, AP: antero-posterior, Lat.: lateral, LPW: lateral pharyngeal wall.