Oura Ring OA15 Validation

Healthy sample Inclusion Criteria: * Ages 18-85 y * Body mass index (BMI) \<30 kg/m2 * Self-reported habitual sleep duration of 6-9 hours * Willing and able to comply with the study requirements Exclusion Criteria: * High risk for mild-to-severe sleep apnea * Individuals with pacemakers * Non-English speakers * Individuals who are unwilling or unable to provide informed consent or comply with study procedures * Current active illness (e.g., cold, flu, bronchitis, suspected COVID-19) * Have known allergies or previous reaction to titanium or medical-grade plastic * Report regularly sleeping \<4 hours per night * Restricted peripheral circulation (e.g. Raynaud's disease) * Individuals with physical limitations or deformities or skin conditions that would preclude safely wearing up to two Oura Ring devices or reference polysomnography equipment * Individuals that have completed overnight rotating shift-work in the past 2 weeks * Individuals that have traveled across time-zones in the past week * Current use (within the past month) of the following medications/classes, pending investigator decision: Stimulants (Adderall, Ritalin); Sodium oxybate; Heroin, cocaine, or methamphetamines; Non-stimulant wake promoting agents (e.g. modafinil, pitolisant, etc.); Prescription sleep medication * Individuals employed by a company that develops or sells medical and/or fitness devices in a similar space (e.g. wearables) or are technology journalists (e.g. professional bloggers, TV, magazine, newspaper reporters, etc.) Sleep Apnea sample Inclusion Criteria * High risk for mild-to-severe sleep apnea, defined by at least one of the following: * Prior clinical diagnosis of obstructive sleep apnea (OSA) * Currently seeking or actively undergoing treatment for sleep apnea (e.g., PAP therapy, oral appliance) * Documented apnea-hypopnea index (AHI) ≥5 events/hour from a previous sleep study * Self-reported Habitual sleep duration of 6-9 hours * Willing and able to comply with study requirements Exclusion criteria * Same as for Healthy Adult sample, with the exception of the "high risk for mild-to-moderate sleep apnea) criterion