Authors:	Schmalbach, Ileana Herhaus, Benedict Pässler, Sebastian Schmalbach, Bjarne Berth, Hendrik Petrowski, Katja
Title:	Effects of stress on chewing and food intake in patients with anorexia nervosa
Online publication date:	12-Sep-2022
Year of first publication:	2021
Language:	english
Abstract:	Objective The present study investigates the impact of psychosocial stress on chewing and eating behavior in patients with anorexia nervosa (PAN). Method The eating and chewing behavior of PAN were examined in a standardized setting by means of a chewing sensor. These procedures encompassed n = 19 PAN, age, and gender matched to n = 19 healthy controls (HC). Food intake and chewing frequency were assessed in two experimental conditions: rest versus stress (via Trier Social Stress Test). To verify stress induction, two appraisal scales were employed. In addition, chronic stress, psychological distress and eating disorder symptoms were assessed. Results In terms of food intake and chewing frequency, the results of the 2x2 ANOVA demonstrated a significant effect of condition and group. During stress, all participants demonstrated a higher chewing frequency and a decreased ingestion. In general, patients ate less at a lower chewing frequency (vs. HC). However, sample specific analyses demonstrated that the eating and chewing behavior of PAN remained unchanged regardless of the condition, except for their drinking. Food choices were comparable between the groups, but appetite values significantly differed. Discussion The increase in chewing frequency in all participants during stress suggests that chewing might impact affect regulation, however, not specifically in PAN. Future research should clarify to what extent the normalization of chewing behavior could ameliorate ED-symptoms (incl. food intake) in PAN. The application of a chewing sensor could support this aim and future interventions.
DDC:	610 Medizin 610 Medical sciences
Institution:	Johannes Gutenberg-Universität Mainz
Department:	FB 04 Medizin
Place:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-7721
Version:	Published version
Publication type:	Zeitschriftenaufsatz
License:	CC BY-NC-ND
Information on rights of use:	https://creativecommons.org/licenses/by-nc-nd/4.0/
Journal:	The international journal of eating disorders 54 7
Pages or article number:	1160 1170
Publisher:	Wiley
Publisher place:	New York, NY
Issue date:	2021
ISSN:	1098-108X
Publisher DOI:	10.1002/eat.23500
Appears in collections:	JGU-Publikationen