Normative values for sleep parameters in pre-schoolers using actigraphy

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Sahlberg , L , Lapinleimu , H , Elovainio , M , Rönnlund , H & Virtanen , I 2018 , ' Normative values for sleep parameters in pre-schoolers using actigraphy ' , Clinical Neurophysiology , vol. 129 , no. 9 , pp. 1964-1970 .

Title: Normative values for sleep parameters in pre-schoolers using actigraphy
Author: Sahlberg, Lassi; Lapinleimu, Helena; Elovainio, Marko; Rönnlund, Hanni; Virtanen, Irina
Contributor organization: Medicum
Psychosocial factors and health
Doctoral Programme in Clinical Research
Department of Psychology and Logopedics
Date: 2018-09
Language: eng
Number of pages: 7
Belongs to series: Clinical Neurophysiology
ISSN: 1388-2457
Abstract: Objective: There are currently no reference values for actigraphy-measured sleep length and fragmentation in preschool children. We created standardized parameters using a community sample. Methods: Ninety-seven 2-to-6-year-old children (56 boys) wore an actigraph on their non-dominant wrist for seven days. The data was extracted and scored, calculating total sleep time, sleep latency, sleep efficiency, fragmentation index, circadian rhythm length, cosine peak and light/dark ratio. Subjects were divided into groups of 2-3-year-olds, 4-5-year-olds and 6-year-olds. Means and standard deviations were calculated, and reference values were created using the 2.5th and the 97.5th percentiles. Results: Reference intervals were 7 h 23 min-9 h 47 min for 24-hour total sleep time, 0.2-48.4 min for sleep latency, 69-87% for sleep efficiency, 23-53% for fragmentation index, 23 h 39 min-24 h 24 min for circadian rhythm length, 12: 37-15: 53 for the timing of the cosine peak, and 1.14-5.63 for the light-dark ratio. With increasing age, daily sleep time, sleep latency, sleep fragmentation, and napping decreased. Conclusions: We were able to create previously non-established reference values, including trends with increasing age, on actigraphy-assessed sleep in preschool children. Significance: Sleep disorders in young children are easier to evaluate against normative data. (C) 2018 International Federation of Clinical Neurophysiology. Published by Elsevier B.V. All rights reserved.
Subject: Children
Reference values
515 Psychology
Peer reviewed: Yes
Rights: cc_by_nc_nd
Usage restriction: openAccess
Self-archived version: acceptedVersion

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