Actigraphy-Based Assessment of Sleep Parameters.
Desta Fekedulegn,Desta Fekedulegn,Michael E. Andrew,Mingming Shi,John M. Violanti,Sarah S. Knox,Kim E. Innes +6 more
TLDR
In this paper, a review of existing algorithms used to estimate sleep/wake cycles from movement data, demonstrate the rules/methods used for estimating sleep parameters, provide clear technical definitions of the parameters, and suggest potential new measures that reflect intraindividual variability.Abstract:
Actigraphy, a method for inferring sleep/wake patterns based on movement data gathered using actigraphs, is increasingly used in population-based epidemiologic studies because of its ability to monitor activity in natural settings. Using special software, actigraphic data are analyzed to estimate a range of sleep parameters. To date, despite extensive application of actigraphs in sleep research, published literature specifically detailing the methodology for derivation of sleep parameters is lacking; such information is critical for the appropriate analysis and interpretation of actigraphy data. Reporting of sleep parameters has also been inconsistent across studies, likely reflecting the lack of consensus regarding the definition of sleep onset and offset. In addition, actigraphy data are generally underutilized, with only a fraction of the sleep parameters generated through actigraphy routinely used in current sleep research. The objectives of this paper are to review existing algorithms used to estimate sleep/wake cycles from movement data, demonstrate the rules/methods used for estimating sleep parameters, provide clear technical definitions of the parameters, and suggest potential new measures that reflect intraindividual variability. Utilizing original data collected using Motionlogger Sleep Watch (Ambulatory Monitoring Inc., Ardsley, NY), we detail the methodology and derivation of 29 nocturnal sleep parameters, including those both widely and rarely utilized in research. By improving understanding of the actigraphy process, the information provided in this paper may help: ensure appropriate use and interpretation of sleep parameters in future studies; enable the recalibration of sleep parameters to address specific goals; inform the development of new measures; and increase the breadth of sleep parameters used.read more
Citations
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References
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Journal ArticleDOI
The role of actigraphy in the study of sleep and circadian rhythms.
Sonia Ancoli-Israel,Roger Cole,Cathy A. Alessi,Mark A. Chambers,William Moorcroft,Charles P. Pollak +5 more
TL;DR: It is suggested that in the clinical setting, actigraphy is reliable for evaluating sleep patterns in patients with insomnia, for studying the effect of treatments designed to improve sleep, in the diagnosis of circadian rhythm disorders (including shift work), and in evaluating sleep in individuals who are less likely to tolerate PSG, such as infants and demented elderly.
The Role of Actigraphy in the Study of Sleep and Circadian Rhythms AMERICAN ACADEMY OF SLEEP MEDICINE REVIEW PAPER
Sonia Ancoli-Israel,Roger Cole,Cathy A. Alessi,Mark A. Chambers,William Moorcroft,Charles P. Pollak +5 more
TL;DR: Wang et al. as discussed by the authors reviewed the current knowledge about the role of actigraphy in the evaluation of sleep disorders and concluded that actigraphys can provide useful information and that it may be a cost-effective method for assessing specific sleep disorders.
Journal ArticleDOI
Automatic sleep/wake identification from wrist activity
TL;DR: In this paper, the authors developed and validated automatic scoring methods to distinguish sleep from wakefulness based on wrist activity using wrist actigraphs during overnight polysomnography, which provided valuable information about sleep and wakefulness that could be useful in both clinical and research applications.
Journal ArticleDOI
Activity-based sleep-wake identification: an empirical test of methodological issues.
TL;DR: Statistical manipulation of activity levels before applying the scoring algorithm indicated that this algorithm is quite robust toward moderate changes in activity level, and was consistently higher than for wake scoring.
Journal ArticleDOI
The role and validity of actigraphy in sleep medicine: An update
TL;DR: This update indicates that according to most studies, actigraphy has reasonable validity and reliability in normal individuals with relatively good sleep patterns, and is sensitive in detecting sleep changes associated with drug treatments and non-pharmacologic interventions.
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