0111 A POLYSOMNOGRAPHIC VALIDATION STUDY OF A NOVEL COMMERCIALLY-AVALIABLE MULTISENSORY SLEEP TRACKER

Abstract

Introduction: The wearables industry is producing novel devices claiming to measure sleep/wake state and, most recently, sleep stage composition, by using information from several bio-signals in addition to motion. We evaluated the validity of a multi-sensor sleep-tracker (the OURA ring) against polysomnography (PSG) in measuring sleep/ wake states, “light sleep” (PSG-N1+N2), “deep sleep” (PSG-N3) and rapid-eye-movement (REM) sleep. Methods: We compared standard PSG and OURA ring sleep data obtained from a single laboratory overnight in forty-one healthy adolescents and young adults (13 females; Age: 17.2 ± 2.4 years). Results: OURA ring significantly underestimated PSG-N3 by about 20min, and overestimated PSG-REM sleep by about 17min (p <6h, 6-7h, >7h were 90.9%, 81.3%, and 92.9%, respectively. Conclusion: The OURA ring showed the potential for detecting sleep outcomes beyond “sleep” and “wake” by using multiple sources of information in addition to motion, including heart rate variability and pulse wave amplitude. The potential and reliability of a multisensory approach in assessing sleep stages needs to be further explored.