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Reliability of Actigraphy for the Assessment of Sleep and Circadian Rhythms in Rett and Related Syndromes.

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Title: Reliability of Actigraphy for the Assessment of Sleep and Circadian Rhythms in Rett and Related Syndromes.
Authors: Byiers, Breanne (AUTHOR), Merbler, Alyssa (AUTHOR), Lockhart, Elijah (AUTHOR), Burkitt, Chantel (AUTHOR), Symons, Frank (AUTHOR)
Source: Journal of Intellectual Disability Research. Mar2026, Vol. 70 Issue 3, p262-273. 12p.
Subjects: Rett syndrome, Research funding, Actigraphy, Descriptive statistics, Sleep duration, Intellectual disabilities, Developmental disabilities, Circadian rhythms, Statistical reliability, Diary (Literary form), Sleep quality, Data analysis software, Decision trees, Time
Abstract: Purpose: Actigraphy is being increasingly used to assess sleep and circadian rhythms among populations with intellectual and developmental disabilities and genetic syndromes, including Rett syndrome and related disorders, but the reliability of these measures in these populations is unclear. The primary purpose of the current study was to evaluate the impact of recording duration on the reliability of various measures of sleep and circadian rhythm in Rett and related syndromes. Method: Two 14‐day recordings were collected between 4 and 12 weeks apart in a sample of 30 individuals (aged 2–36 years; 97% female). Reliability was estimated by calculating statistics based on 3, 5, 7, 10 or 13–14 nights of recording. Results: Most measures of average sleep quality could be reliably estimated with 7–10 nights. Measures of night‐to‐night variability in sleep timing showed poor reliability at all recording durations, whereas night‐to‐night variability in sleep duration showed adequate reliability at 5–7 days of recording. The reliability of measures of circadian rhythm was highly variable. Conclusions: The results suggest that the optimal recording durations for actigraphy in this population vary based on the specific metrics of interest, but most can be measured reliably. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Intellectual Disability Research is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Label: Title
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  Data: Reliability of Actigraphy for the Assessment of Sleep and Circadian Rhythms in Rett and Related Syndromes.
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  Data: <searchLink fieldCode="AR" term="%22Byiers%2C+Breanne%22">Byiers, Breanne</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Merbler%2C+Alyssa%22">Merbler, Alyssa</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lockhart%2C+Elijah%22">Lockhart, Elijah</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Burkitt%2C+Chantel%22">Burkitt, Chantel</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Symons%2C+Frank%22">Symons, Frank</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Intellectual+Disability+Research%22">Journal of Intellectual Disability Research</searchLink>. Mar2026, Vol. 70 Issue 3, p262-273. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Rett+syndrome%22">Rett syndrome</searchLink><br /><searchLink fieldCode="DE" term="%22Research+funding%22">Research funding</searchLink><br /><searchLink fieldCode="DE" term="%22Actigraphy%22">Actigraphy</searchLink><br /><searchLink fieldCode="DE" term="%22Descriptive+statistics%22">Descriptive statistics</searchLink><br /><searchLink fieldCode="DE" term="%22Sleep+duration%22">Sleep duration</searchLink><br /><searchLink fieldCode="DE" term="%22Intellectual+disabilities%22">Intellectual disabilities</searchLink><br /><searchLink fieldCode="DE" term="%22Developmental+disabilities%22">Developmental disabilities</searchLink><br /><searchLink fieldCode="DE" term="%22Circadian+rhythms%22">Circadian rhythms</searchLink><br /><searchLink fieldCode="DE" term="%22Statistical+reliability%22">Statistical reliability</searchLink><br /><searchLink fieldCode="DE" term="%22Diary+%28Literary+form%29%22">Diary (Literary form)</searchLink><br /><searchLink fieldCode="DE" term="%22Sleep+quality%22">Sleep quality</searchLink><br /><searchLink fieldCode="DE" term="%22Data+analysis+software%22">Data analysis software</searchLink><br /><searchLink fieldCode="DE" term="%22Decision+trees%22">Decision trees</searchLink><br /><searchLink fieldCode="DE" term="%22Time%22">Time</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Purpose: Actigraphy is being increasingly used to assess sleep and circadian rhythms among populations with intellectual and developmental disabilities and genetic syndromes, including Rett syndrome and related disorders, but the reliability of these measures in these populations is unclear. The primary purpose of the current study was to evaluate the impact of recording duration on the reliability of various measures of sleep and circadian rhythm in Rett and related syndromes. Method: Two 14‐day recordings were collected between 4 and 12 weeks apart in a sample of 30 individuals (aged 2–36 years; 97% female). Reliability was estimated by calculating statistics based on 3, 5, 7, 10 or 13–14 nights of recording. Results: Most measures of average sleep quality could be reliably estimated with 7–10 nights. Measures of night‐to‐night variability in sleep timing showed poor reliability at all recording durations, whereas night‐to‐night variability in sleep duration showed adequate reliability at 5–7 days of recording. The reliability of measures of circadian rhythm was highly variable. Conclusions: The results suggest that the optimal recording durations for actigraphy in this population vary based on the specific metrics of interest, but most can be measured reliably. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Intellectual Disability Research is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=191353516
RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1111/jir.70068
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 12
        StartPage: 262
    Subjects:
      – SubjectFull: Rett syndrome
        Type: general
      – SubjectFull: Research funding
        Type: general
      – SubjectFull: Actigraphy
        Type: general
      – SubjectFull: Descriptive statistics
        Type: general
      – SubjectFull: Sleep duration
        Type: general
      – SubjectFull: Intellectual disabilities
        Type: general
      – SubjectFull: Developmental disabilities
        Type: general
      – SubjectFull: Circadian rhythms
        Type: general
      – SubjectFull: Statistical reliability
        Type: general
      – SubjectFull: Diary (Literary form)
        Type: general
      – SubjectFull: Sleep quality
        Type: general
      – SubjectFull: Data analysis software
        Type: general
      – SubjectFull: Decision trees
        Type: general
      – SubjectFull: Time
        Type: general
    Titles:
      – TitleFull: Reliability of Actigraphy for the Assessment of Sleep and Circadian Rhythms in Rett and Related Syndromes.
        Type: main
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            NameFull: Byiers, Breanne
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            NameFull: Merbler, Alyssa
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            NameFull: Lockhart, Elijah
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            NameFull: Burkitt, Chantel
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            NameFull: Symons, Frank
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          Dates:
            – D: 01
              M: 03
              Text: Mar2026
              Type: published
              Y: 2026
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              Value: 09642633
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              Value: 70
            – Type: issue
              Value: 3
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            – TitleFull: Journal of Intellectual Disability Research
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