Laboratory and home comparison of wrist-activity monitors and polysomnography in middle-aged adults

Abstract

Accurate measurement of time at lights out is essential for calculation of several measures of sleep in wrist-activity monitors. While some devices use subjective reporting of time of lights out from a sleep diary, others utilise an automated proprietary scoring algorithm to calculate time at lights out, thereby negating the need for a sleep diary. This study aimed to compare sleep-measures from two such devices to polysomnography (PSG) measures (In-Laboratory) and against each other when worn at home (At-Home). Fifty middle-aged adults from the Raine Study underwent overnight PSG during which they wore an ActiGraph™ and a Readiband™. They also wore both devices at home for 7 nights. The Readiband uses an automated proprietary algorithm to determine time at lights out whereas the ActiGraph requires completion of a sleep diary noting this time. In laboratory, compared to PSG: Readiband underestimated time at lights out, sleep onset, and wake after sleep onset, overestimated sleep latency and duration (p<0.001 for all); while ActiGraph underestimated sleep latency and wake after sleep onset and overestimated sleep efficiency and duration (p<0.001 for all). Similar differences between devices were observed on the laboratory night and when at home. In conclusion, an automated algorithm such as the Readiband may be used in the same capacity as the ActiGraph for the collection of sleep measures including time at sleep onset, sleep duration and time at wake. However, Readiband and ActiGraph measures of sleep latency, efficiency and wake after sleep onset should be interpreted with caution.

The effect of water loading for acute weight loss following fluid restriction on sleep quality and quantity in combat sports athletes

“…Another potential factor contributing to these relatively high values of sleep latency may be the Readiband device. The Readiband device has been shown to overestimate sleep latency, as such measures of sleep latency should be interpreted with caution 11 .…”

Development of the athlete sleep behavior questionnaire: A tool for identifying maladaptive sleep practices in elite athletes

“…Participants were also asked to record their sleep and wake times in a diary, to allow for cross-checking and corrections with the actigraphy data. The accuracy and inter-device reliability of the Readiband device has been deemed acceptable, as described elsewhere 26 , 27 .…”

The Clinical Validation of the Athlete Sleep Screening Questionnaire: an Instrument to Identify Athletes that Need Further Sleep Assessment

“…Seventy-one percent of the athletes ( N = 46) could comply with the requirements of the protocol. The protocol included 2 weeks of wrist-watch actigraphy, which is not presented here (Readiband, Fatigue Science, Canada; [ 17 ]), an ASSQ completed at time 2 (T2), a standardized clinical sleep interview with the SMP, a rating of the category of clinical sleep problem from the SMP, a more detailed follow-up interview if required, recommendations for sleep interventions, and an ASSQ completed at time 3 (T3), see Fig. 1 .…”