@article{ref1,
title="The accuracy of the THIM wearable device for estimating sleep onset latency",
journal="Journal of clinical sleep medicine",
year="2021",
author="Whitelaw, Ashwin and Scott, Hannah and Lack, Leon and Lovato, Nicole and Canty, Alex",
volume="ePub",
number="ePub",
pages="ePub-ePub",
abstract="STUDY OBJECTIVES: THIM is a wearable device designed to accurately estimate sleep onset. This article presents two studies that tested the original (Study 1) and a  refined (Study 2) THIM sleep onset algorithms compared to polysomnography (PSG). <br><br>METHODS: Twelve (Study 1) and twenty (Study 2) individuals slept in the laboratory  on two nights where participants underwent THIM-administered sleep onset trials with  simultaneous PSG recording. Participants attempted to fall asleep whilst using THIM,  which woke them once it determined sleep onset. <br><br>RESULTS: In Study 1, there was no  significant difference between PSG (Mean, M = 1.94 min, SD = 1.32) and THIM-sleep  onset latency (M = 2.05 min, SD = 1.38) on the first or second night, p >.07. There  were moderate correlations between PSG and THIM on both nights, r((s)) >.57, p <.001. On 23.74% of trials, PSG-sleep onset could not be determined before THIM ended  the trial. With a revised THIM algorithm in Study 2, there was no significant  difference between PSG (M = 3.41 min, SD = 2.21) and THIM-sleep onset latency (M =  3.65 min, SD = 2.18), p =.25, strong correspondence between the two devices, r((s))  >.73, p <.001, narrow levels of agreement on Bland-Altman plots, and significantly  less trials where PSG-sleep onset had not occurred (10.24%), p =.04. <br><br>CONCLUSIONS:  THIM showed a high degree of correspondence and agreement with PSG for estimating  sleep onset. Future research will investigate whether THIM is accurate with an  insomnia sample for clinical purposes.<p /> <p>Language: en</p>",
language="en",
issn="1550-9389",
doi="10.5664/jcsm.9070",
url="http://dx.doi.org/10.5664/jcsm.9070"
}