Newly developed waist actigraphy and its sleep/wake scoring algorithm

Minori Enomoto, Takuro Endo, Kazue Suenaga, Naoki Miura, Yasushi Nakano, Sayaka Kohtoh, Yujiro Taguchi, Sayaka Aritake, Shigekazu Higuchi, Masato Matsuura, Kiyohisa Takahashi, Kazuo Mishima

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The purpose of this study was to formulate an algorithm for assessing sleep/waking from activity intensities measured with a waist-worn actigraphy, the Lifecorder PLUS (LC; Suzuken Co. Ltd., Nagoya, Japan), and to test the validity of the algorithm. The study consisted of 31 healthy subjects (M/F = 20/11, mean age 31.7years) who underwent one night of simultaneous measurement of activity intensity by LC and polysomnography (PSG). A sleep(S)/wake(W) scoring algorithm based on a linear model was determined through discriminant analysis of activity intensities measured by LC over a total of 235h and 56min and the corresponding PSG-based S/W data. The formulated S/W scoring algorithm was then used to score S/W during the monitoring epochs (2min each, 7078 epochs in total) for each subject. The mean agreement rate with the corresponding PSG-based S/W data was 86.9%, with a mean sensitivity (sleep detection) of 89.4% and mean specificity (wakefulness detection) of 58.2%. The agreement rates for the individual stages of sleep were 60.6% for Stage 1, 89.3% for Stage 2, 99.2% for Stage 3 + 4, and 90.1% for Stage REM. These results demonstrate that sleep/wake activity in young to middle-aged healthy subjects can be assessed with a reliability comparable to that of conventional actigraphy through LC waist actigraphy and the optimal S/W scoring algorithm.

Original languageEnglish
Pages (from-to)17-22
Number of pages6
JournalSleep and Biological Rhythms
Volume7
Issue number1
DOIs
Publication statusPublished - 2009
Externally publishedYes

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Actigraphy
Sleep
Polysomnography
Healthy Volunteers
Wakefulness
Sleep Stages
Discriminant Analysis
Linear Models
Japan

Keywords

  • Actigraphy
  • Polysomnography
  • Sleep-waking
  • Sleep/wakescoring algorithm
  • Waist-worn

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)
  • Neurology
  • Neuropsychology and Physiological Psychology

Cite this

Enomoto, M., Endo, T., Suenaga, K., Miura, N., Nakano, Y., Kohtoh, S., ... Mishima, K. (2009). Newly developed waist actigraphy and its sleep/wake scoring algorithm. Sleep and Biological Rhythms, 7(1), 17-22. https://doi.org/10.1111/j.1479-8425.2008.00377.x

Newly developed waist actigraphy and its sleep/wake scoring algorithm. / Enomoto, Minori; Endo, Takuro; Suenaga, Kazue; Miura, Naoki; Nakano, Yasushi; Kohtoh, Sayaka; Taguchi, Yujiro; Aritake, Sayaka; Higuchi, Shigekazu; Matsuura, Masato; Takahashi, Kiyohisa; Mishima, Kazuo.

In: Sleep and Biological Rhythms, Vol. 7, No. 1, 2009, p. 17-22.

Research output: Contribution to journalArticle

Enomoto, M, Endo, T, Suenaga, K, Miura, N, Nakano, Y, Kohtoh, S, Taguchi, Y, Aritake, S, Higuchi, S, Matsuura, M, Takahashi, K & Mishima, K 2009, 'Newly developed waist actigraphy and its sleep/wake scoring algorithm', Sleep and Biological Rhythms, vol. 7, no. 1, pp. 17-22. https://doi.org/10.1111/j.1479-8425.2008.00377.x
Enomoto, Minori ; Endo, Takuro ; Suenaga, Kazue ; Miura, Naoki ; Nakano, Yasushi ; Kohtoh, Sayaka ; Taguchi, Yujiro ; Aritake, Sayaka ; Higuchi, Shigekazu ; Matsuura, Masato ; Takahashi, Kiyohisa ; Mishima, Kazuo. / Newly developed waist actigraphy and its sleep/wake scoring algorithm. In: Sleep and Biological Rhythms. 2009 ; Vol. 7, No. 1. pp. 17-22.
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