Interobserver Consistency of Drug-Induced Sleep Endoscopy in Diagnosing Obstructive Sleep Apnea Using a VOTE Classification System.

Objectives: To explore the interobserver consistency of drug-induced sleep endoscopy (DISE) for patients with obstructive sleep apnea syndrome (OSAS) and review the current literature. Methods: In total, 55 patients with an apnea-hypopnea index >5, as determined by on overnight sleep study, were included in this study, 45 males and 10 females, with an average age of 46.87 +/- 10.06 years old (range, 19-71). For all OSAS patients, DISE was performed by the same surgeon, which was recorded digitally. The video recordings of DISE were evaluated independently by 3 experienced surgeons who were asked to note his or her decisions as the pattern, site, and degree of upper airway collapse using a VOTE (velum, oropharynx lateral wall, tongue base, and the epiglottis) classification system. Results: Interobserver consistency in the diagnosis of velum-related obstruction in anteroposterior, lateral, and concentric configurations ranged from poor to good. Only significant interobserver consistency among observers A and B was obtained in the diagnosis of oropharynx-related obstruction in the lateral configuration (concordance 60.0%, kappa: 0.365, P 0.20, all P values

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