Comparison of under-mattress sensor and CPAP data for home monitoring in obstructive sleep apnea

PURPOSE: To evaluate sleep duration and respiratory events in comparison with CPAP use time and residual events. METHODS: We evaluated 75 OSA patients using a non-intrusive under-mattress sensor (WITHINGS Sleep Analyzer, WSA) alongside CPAP Resmed Airsense device over 480 nights, with a subset of 14 patients undergoing simultaneous home polysomnography (PSG). We compared total sleep time (TST) with CPAP use time and residual apnea-hypopnea index (AHI) across devices. RESULTS: The WSA recorded longer TST than CPAP use time (437.4 vs. 395.6 min, p < 0.005) and higher AHI than CPAP residual AHI (11.3 vs. 2.0 events/h, p < 0.001). In the PSG subset, WSA AHI closely approximated PSG AHI and exceeded CPAP residual AHI. CONCLUSIONS: The WSA provides a more comprehensive home monitoring of sleep and respiratory events during CPAP therapy, potentially improving treatment assessment and patient engagement, especially in early treatment phases.