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ORIGINAL ARTICLE
J Korean Sleep Res Soc. 2010;7(2):37-42.         doi: https://doi.org/10.13078/jksrs.10007
Influences of the Revised American Academy of Sleep Medicine Criteria for Scoring Apnea and Hypopnea on the Apnea-Hypopnea Index
Cheon Sik Kim, Sang-Ahm Lee, Min Ju Kim, Eun Mi Lee, Yong Seok Lee, Yoo-Sam Chung, and Woo Sung Kim
11Departments of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
2Otolarygology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
3Pulmonary and Critical Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
Corresponding Author: Sang-Ahm Lee ,Tel: +82-2-3010-3445, Fax: +82-2-474- 4691, Email: salee@amc.seoul.kr
Received: 18 August 2010;  Accepted: 20 September 2010.
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ABSTRACT
Objectives: The definition of accurate recording and measuring of sleep related obstructive breathing events are clinically critical as a base for quantifying disease severity in obstructive sleep apnea (OSA) syndrome. The aim of the study was to compare apnea and hypopnea indices using different scoring recommendations.
Methods: We retrospectively selected total 60 patients who were diagnosed with OSA syndrome. All sleep-related parameters including apnea index, hypopnea index, and apnea-hypopnea index (AHI) were measured by two different criteria; 1999 Chicago criteria and 2007 American Academy of Sleep Medicine (AASM) criteria for scoring respiratory events.
Results: Apnea index and AHI by Chicago criteria were significantly higher than those by AASM criteria (mean 21.0/hr vs. 15.1/hr, p<0.001; mean 36.8/hr vs. 29.4/hr, p<0.001, respectively). But hypopnea index was not different between two criteria. Bland-Altman plots demonstrated a median (5th, 95th percentiles) reduction of 6.1/h (0.16, 20.57) when comparing AHI by AASM criteria to AHI by Chicago criteria.
Conclusions: Our results suggested that AASM criteria intended to diagnose more confirmative OSA patients than Chicago criteria. Updated criteria may be stricter but possibly rule out mild OSA patients.
Keywords: 1999 Chicago criteria | 2007 AASM criteria | Apnea-hypopnea index | Obstructive sleep apnea.
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