0453 Comparing Three Home Sleep Apnea Testing Devices to Polysomnography: Assessing Respiratory, Sleep-Wake, and Body Position Data

Abstract

Introduction: We previously compared 3 Home Sleep Apnea Test (HSAT) devices with PSG for evaluating obstructive sleep apnea (OSA). This study is an update with increased patient sample size comparing various metrics including respiratory and sleep-wake data. Methods: Patients were eligible if referred for suspected OSA and HSAT-appropriate. Participants wore three HSAT devices simultaneously for three nights: 1) Device N (Nox T-3; Nox Medical); Device A (ARES; SleepMed, Inc); Device W (WatchPAT, Itamar Medical). Nights 1 (N1) and 2 (N2) were performed at home; Night 3 (N3) was performed simultaneously with PSG. Comparison of respiratory, oximetry, sleep-wake and position metrics were performed for N3. Other analyses based on N1 and N2 are reported separately. Results: 88 (44 women; 47±12 years) patients enrolled; 83 completed N3 testing with PSG. Respiratory: REI4% vs AHI4% showed excellent agreements (reported as R, P value; BlandAltman mean difference, 2SD): “A” (0.96, p0.01; -2.4, 19.9), “N” (0.97, p0.01; 0.3, 15.7), “W” (0.91, p0.01; -1.2, 28.3). RDI showed good correlations but HSAT trended lower than PSG: “A” (0.90, p0.01; -11.0, 35.0), “W” (0.86, p0.01; -13.3, 39.3). “N” does not report RDI. REI3% vs AHI(AASM) also showed excellent agreements: “A” (0.97, p0.01; -4.6, 19.2), “N” (0.97, p0.01; -0.4, 17.1). “W” REI3% was not analyzed due to data loss. Oximetry: Correlation was good for ODI, T90%, and Min Sat (R-ODI, R-T90%, R-Min Sat): “A” (does not report ODI, 0.75, 0.60); “N” (0.99, 0.84, 0.57); “W” (0.93, 0.82, 0.64). All correlations had p0.01. Sleep: “W” performed the best although overall correlations (R-TST, R-sleep efficiency, R-%REM) were weaker than respiratory comparisons: “A” (0.58, 0.61, 0.12); “N” (0.48, 0.19, does not report REM); “W” (0.64, 0.68, 0.54). All except 0.19 and 0.12 were statistically significant. Body Position: “N” displayed strongest agreement for Non- Supine% and non-supine AHI: “A” (0.74, 0.90); “N” (0.91, 0.97); “W” (0.50, 0.84). All p0.01. Conclusion: HSAT demonstrates good agreement with PSG, particularly for respiratory and oximetry data, further strengthening our conclusion that HSAT is reliable for evaluation of OSA.