Timon M Fabius1, Jeffrey R Benistant2,3, Lindsey Bekkedam2,4, Job van der Palen5, Frans H C de Jongh2,6, Michiel M M Eijsvogel2. 1. Department of Pulmonology, Medisch Spectrum Twente, Onderzoeksbureau Longgeneeskunde, P.O. Box 50000, 7500 KA, Enschede, the Netherlands. T.Fabius@mst.nl. 2. Department of Pulmonology, Medisch Spectrum Twente, Onderzoeksbureau Longgeneeskunde, P.O. Box 50000, 7500 KA, Enschede, the Netherlands. 3. Technical Medicine, Faculty of Science and Technology, University of Twente, Enschede, the Netherlands. 4. Faculty of Medical Sciences, University of Groningen, Groningen, the Netherlands. 5. Medical School Twente, Medisch Spectrum Twente, Enschede, the Netherlands. 6. Faculty of Engineering Technology, University of Twente, Enschede, the Netherlands.
Abstract
INTRODUCTION:Obstructive sleep apnea (OSA) is common, and diagnosis requires expensive and laborious testing to assess the apnea hypopnea index (AHI). We performed an analysis to explore the relationship between the oxygen desaturation index (ODI) as measured with pulse oximetry and the AHI in our large portable monitoring (PM) database to find an optimal cutoff value for the ODI in order to be able to exclude AHI ≥ 5 on PM. METHODS:Three thousand four hundred thirteen PM recordings were randomly divided into a training set (N = 2281) and a test set (N = 1132). The optimal cutoff for the ODI to exclude an AHI ≥ 5 on PM was determined in the training set and subsequently validated in the test set. RESULTS: Area under the curve of the ODI to exclude an AHI ≥ 5 on PM was 0.997 in the training set and 0.996 in the test set. In the training set, the optimal cutoff to predict an AHI < 5 was an ODI < 5. Using this cutoff in the test set provided a sensitivity of 97.7%, a specificity of 97.0%, a positive predictive value of 99.2%, and a negative predictive value of 91.4%. CONCLUSION: An ODI < 5 predicts an AHI < 5 with high sensitivity and specificity when measured simultaneously using the same oximeter during PM recording.
RCT Entities:
INTRODUCTION:Obstructive sleep apnea (OSA) is common, and diagnosis requires expensive and laborious testing to assess the apnea hypopnea index (AHI). We performed an analysis to explore the relationship between the oxygen desaturation index (ODI) as measured with pulse oximetry and the AHI in our large portable monitoring (PM) database to find an optimal cutoff value for the ODI in order to be able to exclude AHI ≥ 5 on PM. METHODS: Three thousand four hundred thirteen PM recordings were randomly divided into a training set (N = 2281) and a test set (N = 1132). The optimal cutoff for the ODI to exclude an AHI ≥ 5 on PM was determined in the training set and subsequently validated in the test set. RESULTS: Area under the curve of the ODI to exclude an AHI ≥ 5 on PM was 0.997 in the training set and 0.996 in the test set. In the training set, the optimal cutoff to predict an AHI < 5 was an ODI < 5. Using this cutoff in the test set provided a sensitivity of 97.7%, a specificity of 97.0%, a positive predictive value of 99.2%, and a negative predictive value of 91.4%. CONCLUSION: An ODI < 5 predicts an AHI < 5 with high sensitivity and specificity when measured simultaneously using the same oximeter during PM recording.
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