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

Keith Brazendale1, Michael W Beets1, R Glenn Weaver1

  • 1Arnold School of Public Heath, Department of Exercise Science, University of South Carolina, Columbia, SC, 29208, USA.

Sleep Medicine
|June 13, 2019
PubMed

Insights

Consumer sleep trackers show good agreement for children's sleep and wake times. However, more research is needed to accurately measure total sleep time using these devices.

Area of Science:

  • Pediatric Sleep Medicine
  • Wearable Technology in Health
  • Biomedical Engineering

Background:

  • Emerging consumer-friendly sleep assessment products offer new tools for researchers.
  • Capturing free-living sleep in children presents unique challenges and opportunities.

Purpose of the Study:

  • To compare free-living sleep characteristics, including duration and timing, across different assessment measures in children.
  • To evaluate the agreement between various wearable devices and parent logs for sleep assessment.

Main Methods:

  • Elementary school-aged children (N=30) wore ActiGraph GT9X Link and Fitbit Charge HR devices.
  • A Beddit 3 Sleep Monitor was used concurrently with parent-reported sleep logs.
  • Data were collected over two consecutive weekend nights, with analysis including Bland-Altman plots.

Main Results:

  • Total sleep time (TST) varied across measures, from 458 min/night (ActiGraph) to 613 min/night (Parent report).
  • Bedtimes and wake times showed moderate correlations (r=0.30-0.71) across measures.
  • The Beddit 3 Sleep Monitor and Fitbit Charge HR demonstrated the highest agreement for TST.

Conclusions:

  • High agreement exists for sleep and wake times across various measures in children.
  • Further research is required to accurately determine total sleep time using consumer sleep assessment tools.
Abstract

Keywords:
AccelerometryChildMeasuresSleepTechnology

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