Non-suicidal Self-Injury in Eating Disordered Patients : Associations with Heart Rate Variability and State-Trait Anxiety
Giner Bartolomé, Cristina (Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutrición)
Mallorquí-Bagué, Núria (Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutrición)
Tolosa-Sola, Iris (Institut d'Investigació Biomèdica de Bellvitge)
Steward, Trevor (Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutrición)
Jiménez-Murcia, Susana (Universitat de Barcelona. Departament de Ciències Clíniques)
Granero, Roser (Universitat Autònoma de Barcelona. Departament de Psicobiologia i de Metodologia de Ciències de la Salut)
Fernández-Aranda, Fernando (Universitat de Barcelona. Departament de Ciències Clíniques)

Data:	2017
Resum:	Background: Non-suicidal self-injury (NSSI) is commonly present in individuals with eating disorders (EDs) and is often employed as a maladaptive emotion regulation strategy to avoid or abate negative emotions. One of the most prevalent negative emotions experienced by self-injurers is anxiety; however, this emotion has not been extensively studied in this population. Thus, the aim of our study was to investigate the influence of anxiety on NSSI in patients with ED from two different dimensions: state anxiety and trait anxiety. Methods: The study comprised a total of 66 females: 12 ED patients with NSSI, 32 ED patients without a history of NSSI, and 22 healthy controls. State and trait anxiety were assessed by means of State-Trait Anxiety Inventory (STAI-S-T) and physiological data [i. e. , heart rate variability (HRV)] were collected. Results: STAI-trait scores were significantly higher in ED patients with NSSI than ED patients without NSSI. Furthermore, when conducting logistic regression analyses higher STAI-trait scores were associated with NSSI in ED patients. However, no differences in STAI-state scores and HRV were found between ED patients with and without NSSI. Discussion: The present findings suggest that anxiety as a trait is associated with the use of maladaptive strategies (i. e. , NSSI) in ED patients. These results uphold the need to target trait anxiety in ED treatment in order to prevent possible NSSI behaviors.
Ajuts:	Instituto de Salud Carlos III FIS PI14/00290 Ministerio de Economía y Competitividad PSI2015-68701-R
Nota:	Altres ajuts: CG-B was supported by a pre-doctoral grant (PFIS-FI12/00470). The funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Eating disorders ; Non-suicidal self-injury ; Anxiety ; State-anxiety ; Trait-anxiety ; Heart rate variability
Publicat a:	Frontiers in psychology, Vol. 8 (july 2017) , ISSN 1664-1078

DOI: 10.3389/fpsyg.2017.01163
PMID: 28736544

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