Interactions between daytime sleep and nighttime sleep at 5 and 17 months: Factors from a representative post-pandemic epidemiological cohort

Fréchette-Boilard, G., Petitclerc, A., Côté, S., Reid, G. J., Boivin, M., Pennestri, M.-H. et Touchette, E. (2026). Interactions between daytime sleep and nighttime sleep at 5 and 17 months: Factors from a representative post-pandemic epidemiological cohort. Sleep Health . ISSN 2352-7218 DOI 10.1016/j.sleh.2026.09.006

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Résumé

ABSTRACT

Objectives
Associations between daytime and nighttime sleep remain poorly documented in early infancy, a developmental period during which sleep patterns are still consolidating. This study aims to (1) examine the prospective associations between daytime and nighttime sleep duration, and (2) identify child, maternal and environmental characteristics associated with daytime and nighttime sleep duration at 17 months of age.

Methods
Maternal reports for 3873 infants from the Quebec Longitudinal Study of Child Development (2021-2023) were collected at 5 months (T1) and 17 months (T2) in a post-pandemic population-based cohort. Cross-lagged regression models were conducted using MPlus; associations with P < .01 are reported.

Results
The cross-sectional relations between daytime and nighttime sleep were negative at both T1 (P = .01) and T2 (P < .001). Longer daytime and nighttime sleep at T1 were both associated with longer nighttime sleep at T2 (P < .001). Longer daytime sleep at T1 was associated with longer daytime sleep at T2 (P < .001). However, longer nighttime sleep T1 was not associated with longer daytime sleep at T2. Higher maternal educational attainment, maternal immigrant status, and being a boy were associated with longer daytime sleep at T2. A broader set of maternal and environmental factors, such as younger maternal age, maternal immigrant status, higher weekly screen time at T2, and lower household income were associated with shorter nighttime sleep at T2.

Conclusions
These results highlight the importance of supporting developmentally appropriate sleep opportunities and addressing contextual factors that may shape early sleep health.

Type de document:	Article
Mots-clés libres:	Daytime sleep Naps Nocturnal sleep Contextual factors Etiology Infancy
Date de dépôt:	06 nov. 2026 16:21
Dernière modification:	06 nov. 2026 16:21
Version du document déposé:	Version officielle de l'éditeur
URI:	https://depot-e.uqtr.ca/id/eprint/13332

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