Publications by authors named "Emily B Tyler"

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Comparing measures of free-living sleep in school-aged children.

Sleep Med 2019 08 18;60:197-201. Epub 2019 Apr 18.

Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, K1H 8L1, Canada.

Objective/background: Recent technological advances and emerging commercially-available consumer-friendly sleep assessment products affords researchers with a host of tools to consider for capturing free-living sleep in children. The purpose of this study was to compare free-living sleep characteristics (duration and bed/wake times) across different measures in children.

Methods: Elementary school-aged children (N = 30, mean age 7.2 years, 63% boys, 87% non-Hispanic white) wore an ActiGraph GT9X Link and Fitbit Charge HR on the non-dominant wrist, with a Beddit 3 Sleep Monitor affixed to their mattress for two consecutive weekend nights of free-living sleep. Parents completed a sleep log of bed and wake times. Absolute differences in bed and wake times were examined and Bland Altman plots assessed the level of agreement across sleep measures.

Results: Across the four sleep measures, total sleep time (TST) ranged from 458 min/night (ActiGraph GT9X Link) to 613 min/night (Parent report). Mean bed and wake times ranged from 8:46 to 9:03, and 6:52 to 7:16, respectively. Pearson correlation coefficients were moderate between all four sleep measures (range r = 0.30-0.71). Bland-Altman plots indicated the highest level of agreement for TST was between Beddit 3 Sleep Monitor and Fitbit Charge HR (mean difference -11.7, limits of agreement: 119.0, -142.4 min).

Conclusions: The findings from this study show a high level of agreement of when a child goes to sleep and wakes up across a variety of sleep measures; however, more work is needed to classify TST once the sleep period has commenced.
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August 2019