1199 The Accuracy Of A New Sleep Ring Device For Tracking Sleep And Wakefulness Overnight Using Actigraphy. (27th May 2020)

• Record Type: Journal Article
• Authors: Scott, H; Lovato, N; Lack, L
• Is Part Of: Sleep. Volume 43(2020)Supplement 1
• Page Start: A458
• Page End: A459
• Publication Date: 2020-05-27
• Subjects: Sleep -- Physiological aspects -- Periodicals; Sleep disorders -- Periodicals; Sommeil -- Aspect physiologique -- Périodiques; Sommeil, Troubles du -- Périodiques; Sleep disorders; Sleep -- Physiological aspects; Sleep -- physiological aspects; Sleep Wake Disorders; Psychophysiology; Electronic journals; Periodicals; 616.8498
• DOI: 10.1093/sleep/zsaa056.1193
• Languages: English
• ISSNs: 0161-8105

Abstract

Abstract: Introduction: THIM is a new consumer ring-like device that can passively monitor sleep overnight using actigraphy. This project aimed to develop the THIM sleep tracking algorithm (Study 1), and test its accuracy against polysomnography (PSG) with another independent sample of good and poor sleepers (Study 2). Methods: Study 1: 25 healthy individuals (15 females) aged 25.38 years ( SD = 6.39) slept overnight in the sleep laboratory with THIM, the Philips Spectrum, the Fitbit Flex, and PSG recording simultaneously. The THIM sleep tracking algorithm was developed by optimising sensitivity and specificity with PSG. Study 2: An additional 20 individuals (14 females) aged 23.22 years ( SD = 5.02) slept overnight in the sleep laboratory with the same devices as in Study 1. Results: Study 1: THIM showed high agreement with PSG for estimating sleep (sensitivity = .91) and reasonably high agreement for wakefulness (specificity = .59). There were no significant differences between PSG and THIM for total sleep time, t (24) = 0.76, p = .46, or sleep efficiency, t (24) = 0.56, p = .58. Study 2: THIM showed high agreement with PSG for estimating sleep (sensitivity = .89) and wakefulness (specificity = .59). Compared to PSG, THIM significantly underestimated total sleep time, t (19) = 2.10, p = .049, and sleep efficiency, t (19) = 2.20, p = .04, by an average of 21.35 minutes ( SD = 45.52) and 4.44% ( SD = 9.04), respectively. Conclusion: Together, these studies suggest that THIM is reasonably accurate for monitoring sleep overnight in healthy individuals. Slight modifications to the algorithm and additional sensors could be added to THIM to improve its accuracy. Future research will examine the accuracy of THIM with larger sample sizes and particularly for people with insomnia, with the goal being to incorporate sleep tracking into a mobile-based treatment program for insomnia. Support: The project was funded in-part by the manufacturers of THIM, Re-Time Pty. Ltd. Additional funding was provided by Flinders University.