Validation of the Withings Sleep Analyzer, an under-the-mattress device for the detection of moderate-severe sleep apnea syndrome.

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Abstract

To assess the diagnostic performance of a non-intrusive device placed under the mattress to detect Sleep Apnea Syndrome (SAS).
118 patients suspected of OSAS completed a night at a sleep clinic with a simultaneous polysomnography (PSG) and recording with the Withings Sleep Analyzers (WSA). PSG nights were scored twice: first as simple polygraphy, then as PSG.
Average (SD) apnea-hypopnea index (AHI) from PSG was 31.2 per hour (25.0) and 32.8 per hour (29.9) from WSA. The mean absolute error was 9.5 per hour. The sensitivity, specificity, and area under the ROC curve (AUROC) at thresholds of apnea-hypopnea index (AHI) ≥ 15 per hour were respectively: Se15 = 88.0%, Sp15 = 88.6%, AUROC15 = 0.926. At the threshold of AHI ≥ 30 per hour, Se30 = 86.0%, Sp30 = 91.2%, AUROC30 = 0.954. The average total sleep time from PSG and WSA were 366.6 (61.2) and 392.4 (67.2) minutes, sleep efficiency was 82.5% (11.6) and 82.6% (11.6), and wake time after sleep onset was 62.7 (48.0) and 45.2 (37.3) minutes, respectively.
WSA accurately detects moderate-severe sleep apnea syndrome in patients suspected of SAS. This simple and automated approach could be of great clinical value given the high prevalence of SAS in the general population.
Registry: ClinicalTrials.gov; Title: Validation of Withings Sleep for the Detection of Sleep Apnea Syndrome; Identifier: NCT04234828; URL: https://clinicaltrials.gov/ct2/show/NCT04234828.
© 2021 American Academy of Sleep Medicine.