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Type: Journal article
Title: Movement distribution: a new measure of sleep fragmentation in children with upper airway obstruction
Author: Coussens, S.
Baumert, M.
Kohler, M.
Martin, J.
Kennedy, D.
Lushington, K.
Saint, D.
Pamula, Y.
Citation: Sleep, 2014; 37(12):2025-2034
Publisher: American Academy of Sleep Medicine
Issue Date: 2014
ISSN: 0161-8105
Statement of
Scott Coussens, Mathias Baumert, Mark Kohler, James Martin, Declan Kennedy, Kurt Lushington, David Saint, Yvonne Pamula
Abstract: STUDY OBJECTIVES: To develop a measure of sleep fragmentation in children with upper airway obstruction based on survival curve analysis of sleep continuity. DESIGN: Prospective repeated measures. SETTING: Hospital sleep laboratory. PARTICIPANTS: 92 children aged 3.0 to 12.9 years undergoing 2 overnight polysomnographic (PSG) sleep studies, 6 months apart. Subjects were divided into 3 groups based on their obstructive apnea and hypopnea index (OAHI) and other upper airway obstruction (UAO) symptoms: primary snorers (PS; n = 24, OAHI <1), those with obstructive sleep apnea syndrome (OSAS; n = 20, OAHI ≥1) and non-snoring controls (C; n = 48, OAHI <1). INTERVENTIONS: Subjects in the PS and OSAS groups underwent tonsillectomy and adenoidectomy between PSG assessments. MEASUREMENTS AND RESULTS: Post hoc measures of movement and contiguous sleep epochs were exported and analyzed using Kaplan-Meier estimates of survival to generate survival curves for the 3 groups. Statistically significant differences were found between these group curves for sleep continuity (P < 0.05) when using movement events as the sleep fragmenting event, but not if stage 1 NREM sleep or awakenings were used. CONCLUSION: Using conventional indices of sleep fragmentation in survival curve analysis of sleep continuity does not provide a useful measure of sleep fragmentation in children with upper airway obstruction. However, when sleep continuity is defined as the time between gross body movements, a potentially useful clinical measure is produced.
Keywords: children; movement; sleep continuity; sleep fragmentation; upper airway obstruction
Rights: Copyright status unknown
RMID: 0030010455
DOI: 10.5665/sleep.4264
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Appears in Collections:Electrical and Electronic Engineering publications

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