• Derek J Lam, Edward M Weaver, Carol J Macarthur, Henry A Milczuk, Eleni O'Neill, Timothy L Smith, Thuan Nguyen, and Steven A Shea.
• Department of Otolaryngology-Head and Neck Surgery, Oregon Health and Science University, Portland, Oregon.
• Laryngoscope. 2016 Jun 1; 126 (6): 1492-8.

Objectives/HypothesisAssess the reliability of a Sleep Endoscopy Rating Scale (SERS) and its relationship with pediatric obstructive sleep apnea (OSA) severity.Study DesignRetrospective case series of pediatric patients who underwent drug-induced sleep endoscopy (DISE) at the time of surgery for OSA from January 1, 2013 to May 1, 2014.MethodsThree blinded otolaryngologists scored obstruction on DISE recordings as absent (0), partial (+1), or complete (+2) at six anatomic levels: nasal airway, nasopharynx, velopharynx, oropharynx, hypopharynx, and arytenoids. Ratings were summed for a SERS total score (range, 0-12). Reliability was calculated using a κ statistic with linear weighting. SERS ratings and obstructive apnea-hypopnea index (OAHI) were compared using Spearman correlation. A receiver operating characteristic (ROC) analysis determined the ability of the SERS total score to predict severe OSA (OAHI >10).ResultsThirty-nine patients were included (mean age, 8.3 ± 5.1 years; 36% obese; mean OAHI, 19.1 ± 23.7). Intrarater and inter-rater reliability was substantial-to-excellent (κ = 0.61-0.83) and fair-to-substantial (κ = 0.33-0.76), respectively. Ratings correlated best with OAHI for the oropharynx (r = 0.54, P = .02), hypopharynx (r = 0.48, P = .04), and SERS total score (r = 0.75, P = .002). In ROC analysis, a SERS total score ≥6 demonstrated sensitivity/specificity of 81.8%/87.5%, respectively, and correctly classified 84% of patients.ConclusionsThe SERS can be applied reliably in children undergoing DISE for OSA. Ratings of the oropharynx, hypopharynx, and SERS total score demonstrated significant correlation with OSA severity. A SERS total score ≥6 was an accurate predictor of severe OSA.Level Of Evidence4. Laryngoscope, 126:1492-1498, 2016.© 2016 The American Laryngological, Rhinological and Otological Society, Inc.

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