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Suicide ideation among high-risk adolescent females: Examining the interplay between parasympathetic regulation and friendship support

Published online by Cambridge University Press:  29 December 2016

Matteo Giletta*
Affiliation:
Tilburg University, Tilburg
Paul D. Hastings
Affiliation:
University of California, Davis
Karen D. Rudolph
Affiliation:
University of Illinois Urbana–Champaign
Daniel J. Bauer
Affiliation:
University of North Carolina at Chapel Hill
Matthew K. Nock
Affiliation:
Harvard University
Mitchell J. Prinstein*
Affiliation:
University of North Carolina at Chapel Hill
*
Address correspondence and reprint requests to: Matteo Giletta, Department of Developmental Psychology, Tilburg University, P.O. Box 90153, 5000 LE, Tilburg, The Netherlands; E-mail: m.giletta@uvt.nl; or Mitch Prinstein, Department of Psychology, University of North Carolina at Chapel Hill, Davie Hall, Campus Box 3270, Chapel Hill, NC 27599-3270; E-mail: mitch.prinstein@unc.edu.
Address correspondence and reprint requests to: Matteo Giletta, Department of Developmental Psychology, Tilburg University, P.O. Box 90153, 5000 LE, Tilburg, The Netherlands; E-mail: m.giletta@uvt.nl; or Mitch Prinstein, Department of Psychology, University of North Carolina at Chapel Hill, Davie Hall, Campus Box 3270, Chapel Hill, NC 27599-3270; E-mail: mitch.prinstein@unc.edu.

Abstract

Poor physiological self-regulation has been proposed as a potential biological vulnerability for adolescent suicidality. This study tested this hypothesis by examining the effect of parasympathetic stress responses on future suicide ideation. In addition, drawing from multilevel developmental psychopathology theories, the interplay between parasympathetic regulation and friendship support, conceptualized as an external source of regulation, was examined. At baseline, 132 adolescent females (M age = 14.59, SD = 1.39) with a history of mental health concerns participated in an in vivo interpersonal stressor (a laboratory speech task) and completed self-report measures of depressive symptoms and perceived support within a close same-age female friendship. Respiratory sinus arrhythmia (RSA) was measured before and during the speech task. Suicide ideation was assessed at baseline and at 3, 6, and 9 months follow-up. The results revealed that females with greater relative RSA decreases to the laboratory stressor were at higher risk for reporting suicide ideation over the subsequent 9 months. Moreover, parasympathetic responses moderated the effect of friendship support on suicide ideation; among females with mild changes or higher relative increases in RSA, but not more pronounced RSA decreases, friendship support reduced risk for future suicide ideation. Findings highlight the crucial role of physiological and external regulation sources as protective factors for youth suicidality.

Type
Regular Articles
Copyright
Copyright © Cambridge University Press 2016 

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Footnotes

This work was supported in part by National Institute of Mental Health Grant R01-MH085505.

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