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KMID : 0900220180250010032
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대한비과학회지
2018 Volume.25 No. 1 p.32 ~ p.37
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Accuracy Analysis of Embletta X100 for the Diagnosis of Obstructive Sleep Apnea and the Assessment of Sleep Structure
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Kim Hyun-Jun
Cho Jae-Hoon
Kang So-Young
Choi Byoung-Joo
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Abstract
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Background and Objectives: To measure the accuracy of Embletta X100, a level 2 portable sleep monitoring device, for
diagnosis of obstructive sleep apnea and assessment of sleep structure.
Materials and Method: We enrolled 200 consecutive patients who had been referred due to habitual snoring or witnessed apnea during sleep and had undergone standard polysomnography (PSG). We created a simulated situation similar to that of the Embletta X100 using only data from PSG and scored the sleep stage and the apnea-hypopnea index (AHI). Thereafter, the results of PSG and simulated Embletta X100 were compared.
Results: Sensitivity, specificity, and positive and negative predictive values of simulated Embletta X100 based on PSG were nearly 100% at three different cutoff values of AHI (5, 15, and 30). Intraclass correlation (ICC) of simulated Embletta X100 based on PSG was also excellent (≥0.9) for most of the sleep-related parameters and respiratory index. However, ICC of sleep stage percent was variable according to sleep stage (>0.9 for N1 and N2, 0.664 for N3, and 0.864 for R).
Conclusion: Although sleep staging is not very precise, Embletta X100 matches well with PSG overall.
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KEYWORD
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Obstructive sleep apnea, Portable sleep monitoring, Embletta X100
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