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Reliability of sleep spindle measurements in adolescents: How many nights are necessary?
Author(s) -
Reynolds Chelsea M.,
Gradisar Michael,
Short Michelle A.
Publication year - 2019
Publication title -
journal of sleep research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 117
eISSN - 1365-2869
pISSN - 0962-1105
DOI - 10.1111/jsr.12698
Subject(s) - sleep spindle , sleep (system call) , reliability (semiconductor) , audiology , duration (music) , psychology , physical medicine and rehabilitation , medicine , eye movement , computer science , non rapid eye movement sleep , physics , neuroscience , acoustics , power (physics) , quantum mechanics , operating system
Summary Evidence of night‐to‐night variation in adolescent sleep spindle characteristics is lacking. Twelve adolescents ( M = 15.8 ± 0.8 years, eight males) participated in a laboratory study involving 9 nights with 10 hr sleep opportunity. Sleep electroencephalograph was analysed and intra‐class coefficients calculated to determine the reliability of sleep spindles across multiple nights of recording. Slow spindle amplitude and fast spindle density, duration and amplitude characteristics all had acceptable reliability within a single night of sleep recording. Slow spindle density and duration measurements needed a minimum of 4 and 2 nights, respectively, for reliable estimation. Theoretical and methodological implications are discussed.