2026-09-15 コンコルディア大学
＜関連情報＞
- https://www.concordia.ca/news/stories/2026/09/15/poor-sleep-in-one-partner-can-affect-both-partners-diets-new-study-finds.html
- https://academic.oup.com/abm/article/60/1/kaag041/8729167?login=false
カップルにおける睡眠の質、食事関連の自己制御、および食事の質の間の二者間関連性 Dyadic associations between sleep quality, diet-related self-regulation, and diet quality in couples
Maegan Dymarski, MA,Tamara R Cohen, PhD,Noémie Carbonneau, PhD,Kaberi Dasgupta, MD, MSc,Jean-Philippe Gouin, PhD
Annals of Behavioral Medicine Published:09 July 2026
DOI:https://doi.org/10.1093/abm/kaag041
Abstract
Background
Although poor sleep is known to impair diet quality and self-regulation, research has primarily examined these effects within individuals. For cohabiting couples, one partner’s poor sleep may affect both partners’ diet quality.
Purpose
This study examined whether sleep quality is associated with both one’s own and one’s partner’s diet quality, and whether impaired self-regulation processes linked partners’ poor sleep and poor diet quality.
Methods
We conducted a 3-month dyadic longitudinal study with 204 cohabiting couples (N = 408; M age = 42.4 years). Participants completed assessments of sleep quality (Pittsburgh Sleep Quality Index) and diet quality (Starting the Conversation on Diet) at baseline, 1-month, and 3-month follow-ups. Following baseline, participants completed a 14-day daily diary assessing diet-related self-regulation based on the Health Action Process Approach.
Results
Using Actor-Partner Interdependence Models, we found both actor (b = 0.07; 95% CI, 0.01-0.13; P = .026) and partner effects (b = 0.10; 95% CI, 0.04-0.16; P = .001) of sleep quality on diet quality at baseline, indicating that an individual’s sleep quality was independently associated with both their own and their partner’s diet quality. Similarly, there were actor and partner effects of sleep quality on self-regulatory effort and self-efficacy. There were significant indirect effects of partners’ sleep quality on the actor’s diet quality through the actor’s self-regulatory effort and self-efficacy.
Conclusions
Poor sleep quality has both individual and dyadic associations with diet quality in couples. Poor sleep in one partner is also associated with impaired diet-related self-regulation in both partners.
