How many nights are needed? The short-term stability of intraindividual variability in sleep parameters derived from accelerometry data in a cohort of normal sleepers.

Josh Leota^1,2,3, Brett A Messman^4,5, Flora Le¹, Summer Jasinski³, Emily R Capodilupo³, Elise R Facer-Childs¹, Joshua F Wiley¹

¹School of Psychological Sciences, Monash University, Melbourne, Vic, Australia.

²Division of Sleep and Circadian Disorders, Department of Medicine, Brigham and Women's Hospital, Boston, MA, United States.

³Department of Research, Algorithms, and Data Science, Whoop Inc., Boston, MA, United States.

⁴Department of Psychology, University of North Texas, Denton, TX, United States.

⁵Center for Healthy Aging, The Pennsylvania State University, State College, PA, United States.

PubMed PMC DOI PDF

Abstract

STUDY OBJECTIVES: Individual sleep/wake patterns can be characterized by the intraindividual mean (iM) and variability (iSD), which captures night-to-night fluctuations. Most accelerometry-based sleep studies assess 7-14 nights, which may be insufficient for reliable variability estimates. This pre-registered, large-cohort study quantifies how many nights are needed for reliable sleep iM and iSD e…

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