Counting Zs: Determining the Monitoring Days Needed to Obtain Reliable Sleep Metrics in Older Adults with Mild Cognitive Impairment.

IF 2 3区医学 Q3 CLINICAL NEUROLOGY

Behavioral Sleep Medicine Pub Date : 2026-07-01 Epub Date: 2026-02-24 DOI:10.1080/15402002.2026.2635121

Jun Ha Chang, Xinyu Sun, Su Chen, Ying Zhang, Daniel L Murman, Vaishali Phatak, Jennifer Merickel, Elizabeth Vlock, Matthew Rizzo

{"title":"Counting Zs: Determining the Monitoring Days Needed to Obtain Reliable Sleep Metrics in Older Adults with Mild Cognitive Impairment.","authors":"Jun Ha Chang, Xinyu Sun, Su Chen, Ying Zhang, Daniel L Murman, Vaishali Phatak, Jennifer Merickel, Elizabeth Vlock, Matthew Rizzo","doi":"10.1080/15402002.2026.2635121","DOIUrl":null,"url":null,"abstract":"Objective: This study aims to determine the minimum number of days required to obtain reliable actigraphy-measured sleep metrics in older adults with Mild Cognitive Impairment (MCI).Methods: One hundred and fourteen older adults (61 with MCI, 53 cognitively unimpaired) wore wrist-worn actigraphy devices for at least 60 days. Total sleep time (TST), sleep efficiency (SE), and wake after sleep onset (WASO) were calculated over cumulative windows (2 - 59) and compared to 60-day reference values using linear mixed-effect regression models. Sensitivity analyses were conducted using 30- and 45-day references.Results: Across all participants, reliable estimates required a minimum of 8 days for TST and 6 days for SE and WASO. Participants with MCI required more days than controls (9 vs. 2 days for TST, 7 vs. 4 days for SE, and 6 vs. 2 days for WASO). Sensitivity analyses showed that shorter monitoring periods (30 and 45 days) could still provide reliable metrics.Conclusions: To obtain reliable sleep metrics, at least 9 days of actigraphy data are needed for older adults with MCI, compared to 4 days for controls, suggesting the need for extended monitoring in cognitively impaired individuals.","PeriodicalId":55393,"journal":{"name":"Behavioral Sleep Medicine","volume":" ","pages":"451-462"},"PeriodicalIF":2.0000,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13390599/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Behavioral Sleep Medicine","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1080/15402002.2026.2635121","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/2/24 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"CLINICAL NEUROLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

Objective: This study aims to determine the minimum number of days required to obtain reliable actigraphy-measured sleep metrics in older adults with Mild Cognitive Impairment (MCI).

Methods: One hundred and fourteen older adults (61 with MCI, 53 cognitively unimpaired) wore wrist-worn actigraphy devices for at least 60 days. Total sleep time (TST), sleep efficiency (SE), and wake after sleep onset (WASO) were calculated over cumulative windows (2 - 59) and compared to 60-day reference values using linear mixed-effect regression models. Sensitivity analyses were conducted using 30- and 45-day references.

Results: Across all participants, reliable estimates required a minimum of 8 days for TST and 6 days for SE and WASO. Participants with MCI required more days than controls (9 vs. 2 days for TST, 7 vs. 4 days for SE, and 6 vs. 2 days for WASO). Sensitivity analyses showed that shorter monitoring periods (30 and 45 days) could still provide reliable metrics.

Conclusions: To obtain reliable sleep metrics, at least 9 days of actigraphy data are needed for older adults with MCI, compared to 4 days for controls, suggesting the need for extended monitoring in cognitively impaired individuals.

查看原文本刊更多论文

计算睡眠时间：确定轻度认知障碍老年人获得可靠睡眠指标所需的监测天数。

目的：本研究旨在确定在轻度认知障碍（MCI）老年人中获得可靠的活动仪测量睡眠指标所需的最少天数。方法：114名老年人（61名患有轻度认知障碍，53名认知功能正常）佩戴腕带活动记录仪至少60天。总睡眠时间（TST）、睡眠效率（SE）和睡眠后觉醒（WASO）在累积窗口（2 - 59）内计算，并使用线性混合效应回归模型与60天参考值进行比较。采用30天和45天的参考文献进行敏感性分析。结果：在所有参与者中，可靠的估计至少需要8天的TST和6天的SE和WASO。MCI患者比对照组需要更多的时间（TST为9天对2天，SE为7天对4天，WASO为6天对2天）。敏感性分析表明，较短的监测周期（30天和45天）仍然可以提供可靠的指标。结论：为了获得可靠的睡眠指标，老年轻度认知障碍患者需要至少9天的活动记录仪数据，而对照组为4天，这表明需要延长对认知障碍患者的监测时间。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Behavioral Sleep Medicine CLINICAL NEUROLOGY-PSYCHIATRY

CiteScore

7.20

自引率

3.20%

发文量

审稿时长

>12 weeks

期刊介绍： Behavioral Sleep Medicine addresses behavioral dimensions of normal and abnormal sleep mechanisms and the prevention, assessment, and treatment of sleep disorders and associated behavioral and emotional problems. Standards for interventions acceptable to this journal are guided by established principles of behavior change. Intending to serve as the intellectual home for the application of behavioral/cognitive science to the study of normal and disordered sleep, the journal paints a broad stroke across the behavioral sleep medicine landscape. Its content includes scholarly investigation of such areas as normal sleep experience, insomnia, the relation of daytime functioning to sleep, parasomnias, circadian rhythm disorders, treatment adherence, pediatrics, and geriatrics. Multidisciplinary approaches are particularly welcome. The journal’ domain encompasses human basic, applied, and clinical outcome research. Behavioral Sleep Medicine also embraces methodological diversity, spanning innovative case studies, quasi-experimentation, randomized trials, epidemiology, and critical reviews.