0300 Interim Analysis from the Oura Validation Study: Examining Sleep Staging from Oura Rings Worn Simultaneously
Rebecca Robbins, Jason Sullivan, Katherine Gilmore, Samantha Shaw, Abigail Benz, Matthew Weaver, Laura Barger, Stuart Quan, Charles Czeisler, Jeanne DuffyAbstract
Introduction
Sleep tracking using consumer devices is increasingly prevalent in the population. Given this interest, it is essential that data produced by these monitors is reliable and accurate. In a single night study with the primary aim of validating the Oura Ring in comparison to polysomnography (PSG), participants wore Oura Rings on their right and left hand. This interim analysis explores the correlation between the rings with respect to total sleep time (TST) and sleep staging.
Methods
Participants (n=20) underwent single-night PSG in the Brigham and Women’s Hospital Center for Clinical Investigation. Each participant wore two Gen3 Oura Rings, one on each index finger, both running the Oura Sleep Staging Algorithm 2.0. We computed within-subject nightly totals for TST and sleep stages (light sleep; deep sleep; and Rapid Eye Movement, REM sleep) as detected by each ring. Then, we computed pairwise correlation coefficients for sleep and sleep staging data between the rings.
Results
Participants were 75% female and 25% male; 20% Asian, 10% Black/African American, and 60% White; 15% were Hispanic. Average age was 30.7±7.8 years. In-lab bedtimes ranged from 9:15 pm–1:40 am and waketimes from 5:15 am–9:40 am. On the Beck Anxiety index, most participants (95%) demonstrated minimal anxiety. No participants met criteria for insomnia (Athens Insomnia Scale), sleep apnea (Berlin Sleep Questionnaire), or Restless Legs Syndrome. On the Pittsburgh Sleep Quality Index, most participants reported good sleep quality (90%). Correlation between the rings was 0.90 (p< 0.001) for TST, 0.85 (p< 0.001) for wake. 0.83 (p< 0.001) for light sleep, 0.86 (p< 0.001) for deep sleep, and 0.86 (p< 0.001) for REM sleep.
Conclusion
We observed a high correlation between TST and sleep staging data from Oura Rings worn on the left and right hands simultaneously, similar to those observed between Registered Polysomnographic Technologists. We plan to examine how Oura sleep staging relates to PSG, and whether agreement is associated with hand dominance.
Support (if any)
This project was funded by Ouraring Inc. and the studies were carried out at the BWH CCI, with support from Harvard Catalyst, The Harvard Clinical and Translational Science Center (NIH UL1TR002541). Additional support from the NHLBI (K01HL150339).