Clinical Research Directory

Inclusion Criteria: * diagnosed with OSA (apnea-hyponea index \[AHI\])≥ 5 /h) by type 1 polysomnography * no prior use of PAP (CPAP or auto-adjusting PAP \[APAP\]), or no prior use of PAP within the previous 90 days in patients who had received PAP therapy, or current PAP users with average daily usage (all days) \< 4 hours within the previous 90 days Exclusion Criteria: * patients who refuse PAP therapy * patients who have used a smart watch (e.g., Galaxy Watch, Apple Watch, etc.) within the previous 90 days * patients with central sleep apnea or neuromuscular disease * patients receiving supplemental oxygen therapy due to underlying diseases including heart failure, stroke, chronic obstructive pulmonary disease, interstitial pulmonary disease, hypoventilation syndrome, or whose baseline oxygen saturation is less than 90% * patients with implanted cardiac pacemakers, defibrillators, or other electronic devices * patients who are inexperienced in using smartphones, apps, or smart watches * patients with an inability or unwillingness to provide informed consent