Clinical Research Directory

Inclusion Criteria: * Adults ≥18 years at screening. * Able and willing to provide written informed consent. * Belonging to one of three strata: (a) healthy controls without diagnosed sleep disorder, (b) patients with physician-diagnosed OSA, or (c) patients with physician-diagnosed insomnia (based on DSM-5/AASM criteria and ISI ≥15) * Capable of using a smartphone for app-based data syncing. * Willing to comply with study visits, wearable use, and saliva sampling. Exclusion Criteria: * • Dermatologic conditions preventing wearable use. * Significant psychiatric or neurologic illness that may impair compliance. * Shift work or trans-meridian travel within 2 weeks prior. * Currently pregnant * Use of medications known to significantly alter circadian rhythm (e.g., exogenous melatonin, beta-blockers).