1 École de psychologie, Université Laval, Québec, Québec, Canada; Centre d'étude des troubles du sommeil, Université Laval, Québec, Québec, Canada. Electronic address: lydi-anne.vezina-im.1@ulaval.ca.
2 École de psychologie, Université Laval, Québec, Québec, Canada; Centre d'étude des troubles du sommeil, Université Laval, Québec, Québec, Canada.
3 Department of Psychology, Toronto Metropolitan University, Toronto, Ontario, Canada.
4 Department of Pediatrics, University of Ottawa, Ottawa, Ontario, Canada; Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada.
5 Department of Health, Kinesiology and Applied Physiology, Concordia University, Montréal, Québec, Canada; Centre de recherche de l'Institut universitaire de gériatrie de Montréal (CRIUGM), CIUSSS du Centre-Sud-de-l'île-de-Montréal, Montréal, Québec, Canada.
6 Department of Psychology, Queen's University, Kingston, Ontario, Canada.
7 School of Psychology, University of Ottawa, Ottawa, Ontario, Canada; Sleep Research Unit, University of Ottawa Institute of Mental Health Research at the Royal, Ottawa, Ontario, Canada.

Objectives: To evaluate whether bedtime screen use is associated with sleep health and if this association varies by biological sex, age, and income among adults in Canada.

Methods: Data were collected through a national stratified random population-based phone interview on sleep health among adults (=18 years) from Canada. Self-reported bedtime screen use (in bed or within 1 hour of bedtime) of the past month was used to classify participants into three groups: occasional (

Results: The sample included 1342 adults (51.5% females; 41.7% between 40-64 years) and 45.3% reported bedtime screen use every day. After accounting for biological sex, age, and income, both occasional and regular screen users reported the best overall sleep health. Results varied by sleep health dimension and biological sex was a moderator of the bedtime screen use and sleep regularity association. Bedtime screen use frequency was significantly associated (p = .01) with sleep regularity only among males.

Conclusions: The association between bedtime screen use and sleep health appears complex as bedtime screen use frequency, the sleep health dimension measured, and biological sex can all influence this relationship. More research is needed to understand the sleep health and bedtime screen use association and moderators of this relationship in adults.