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Title: The contribution of sleep to anorexia nervosa severity.
Austin Authors: Malcolm, Amy;Toh, Wei Lin;Crocker, Kaitlyn;Phillipou, Andrea 
Affiliation: Mental Health
Centre for Mental Health, Faculty of Health, Arts and Design, AMDC907, Swinburne University of Technology, John St, Hawthorn, VIC, 3122, Australia
Department of Mental Health, St Vincent's Hospital, Melbourne, Australia
Department of Psychiatry, The University of Melbourne, Melbourne, Australia
Issue Date: May-2022
Date: 2021-08-23
Publication information: Eating and Weight Disorders : EWD 2022-05; 27(4): 1563-1568
Abstract: Anorexia nervosa (AN) is associated with poor sleep and altered circadian rhythms. Evidence is unclear as to whether these features relate to ongoing psychiatric symptoms of AN, or are merely concomitant with low weight. In this study, we sought to evaluate subjective sleep quality and sleep-wake preferences in a sample of individuals with lifetime AN. Furthermore, we aimed to examine whether sleep quality would significantly predict AN symptom severity, after accounting for demographic features and negative emotions (depression, anxiety and stress). Adults with a lifetime diagnosis of AN (n = 96) or no lifetime psychiatric diagnoses (NC; n = 246) completed an online survey assessing demographics, sleep quality, circadian sleep-wake preferences, eating disorder symptoms, and negative emotions. AN participants reported significantly poorer sleep quality overall, including increased sleep disturbances, use of sleep medications, and daytime dysfunction, as compared to NC participants. Groups did not differ significantly in circadian sleep-wake preferences. Regression analysis showed that among AN participants, sleep quality and negative emotions significantly predicted AN symptom severity, while sex and body mass index (BMI) did not. The findings demonstrate that poor sleep quality was associated with more severe symptoms of AN, even when accounting for negative emotions and BMI. Future research should investigate causal interactions between sleep quality and AN symptom severity longitudinally and across different recovery stages. Level III-Cohort and case-control analytic studies.
DOI: 10.1007/s40519-021-01286-2
ORCID: 0000-0002-9746-8712
Journal: Eating and Weight Disorders : EWD
PubMed URL: 34426951
Type: Journal Article
Subjects: Anorexia nervosa
Body mass index
Circadian rhythm
Eating disorders
Appears in Collections:Journal articles

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