A New Approach for Assessing Sleep Duration and Postures from Ambulatory Accelerometry

34 Pages Posted: 9 Nov 2012

See all articles by Cornelia Wrzus

Cornelia Wrzus

Max Planck Society for the Advancement of the Sciences - Max Planck Institute for Human Development

Andreas M. Brandmaier

Max Planck Society for the Advancement of the Sciences - Max Planck Institute for Human Development

Timo Von Oertzen

affiliation not provided to SSRN

Viktor Müller

affiliation not provided to SSRN

Gert G. Wagner

German Institute for Economic Research (DIW Berlin); Berlin University of Technology; German Socio-Economic Panel Study (SOEP)

Michaela Riediger

Max Planck Society for the Advancement of the Sciences - Max Planck Institute for Human Development

Date Written: November 2012

Abstract

Interest in the effects of sleeping behavior on health and performance is continuously increasing–both in research and with the general public. Ecologically valid investigations of this research topic necessitate the measurement of sleep within people’s natural living contexts. We present evidence that a new approach for ambulatory accelerometry data offers a convenient, reliable, and valid measurement of both people’s sleeping duration and quality in their natural environment. Ninety-two participants (14–83 years) wore acceleration sensors on the sternum and right thigh while spending the night in their natural environment and following their normal routine. Physical activity, body posture, and change in body posture during the night were classified using a newly developed classification algorithm based on angular changes of body axes. The duration of supine posture and objective indicators of sleep quality showed convergent validity with self-reports of sleep duration and quality as well as external validity regarding expected age differences. The algorithms for classifying sleep postures and posture changes very reliably distinguished postures with 99.7% accuracy. We conclude that the new algorithm based on body posture classification using ambulatory accelerometry data offers a feasible and ecologically valid approach to monitor sleeping behavior in sizable and heterogeneous samples at home.

Keywords: ambulatory monitoring, accelerometry, sleep duration, sleep posture, age differences

Suggested Citation

Wrzus, Cornelia and Brandmaier, Andreas M. and Von Oertzen, Timo and Müller, Viktor and Wagner, Gert G. and Riediger, Michaela, A New Approach for Assessing Sleep Duration and Postures from Ambulatory Accelerometry (November 2012). SOEPpaper No. 507, Available at SSRN: https://ssrn.com/abstract=2172703 or http://dx.doi.org/10.2139/ssrn.2172703

Cornelia Wrzus (Contact Author)

Max Planck Society for the Advancement of the Sciences - Max Planck Institute for Human Development ( email )

Lentzeallee 94
D-14195 Berlin, 14195
Germany

Andreas M. Brandmaier

Max Planck Society for the Advancement of the Sciences - Max Planck Institute for Human Development ( email )

Lentzeallee 94
Berlin, D-14195
Germany

Timo Von Oertzen

affiliation not provided to SSRN ( email )

Viktor Müller

affiliation not provided to SSRN ( email )

Gert G. Wagner

German Institute for Economic Research (DIW Berlin) ( email )

Mohrenstraße 58
Berlin, 10117
Germany
+49 30 8 978 9290 (Phone)
+49 30 8 978 9200 (Fax)

HOME PAGE: http://www.diw.de/programme/jsp/MA.jsp?language=en&uid=gwagner

Berlin University of Technology ( email )

Straße des 17
Berlin, 10623
Germany
+30 8 978 9283 (Phone)

German Socio-Economic Panel Study (SOEP) ( email )

DIW Berlin
10108 Berlin, Berlin
Germany
+49 30 8978 9290 (Phone)
+49 30 8978 9109 (Fax)

HOME PAGE: http://www.diw/en/soep

Michaela Riediger

Max Planck Society for the Advancement of the Sciences - Max Planck Institute for Human Development ( email )

Lentzeallee 94
D-14195 Berlin, 14195
Germany
+49 0 30-82406-411 (Phone)

HOME PAGE: http://ntfm.mpib-berlin.mpg.de/mpib/FMPro

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