Investigating the interaction between sleep symptoms of arousal and acquired capability in predicting suicidality

Hochard, Kevin D. and Heym, Nadja and Townsend, Ellen (2016) Investigating the interaction between sleep symptoms of arousal and acquired capability in predicting suicidality. Suicide and Life-Threatening Behavior . pp. 1-12. ISSN 1943-278X

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Abstract

Heightened arousal significantly interacts with acquired capability to predict suicidality. We explore this interaction with insomnia and nightmares independently of waking state arousal symptoms, and test predictions of the Interpersonal Theory of Suicide (IPTS) and Escape Theory in relation to these sleep arousal symptoms. Findings from our e-survey (n = 540) supported the IPTS over models of Suicide as Escape. Sleep-specific measurements of arousal (insomnia and nightmares) showed no main effect, yet interacted with acquired capability to predict increased suicidality. The explained variance in suicidality by the interaction (1%–2%) using sleep-specific measures was comparable to variance explained by interactions previously reported in the literature using measurements composed of a mix of waking and sleep state arousal symptoms. Similarly, when entrapment (inability to escape) was included in models, main effects of sleep symptoms arousal were not detected yet interacted with entrapment to predict suicidality. We discuss findings in relation to treatment options suggesting that sleep-specific interventions be considered for the long-term management of at-risk individuals.

Item Type: Article
Additional Information: This is the peer reviewed version of the following article: Hochard, K.D., Heym, N. and Townsend, E. (2016), Investigating the Interaction Between Sleep Symptoms of Arousal and Acquired Capability in Predicting Suicidality. Suicide Life Threat Behav., which has been published in final form at doi:10.1111/sltb.12285. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Keywords: Sleep disturbances, acquired capability, suicidality
Schools/Departments: University of Nottingham UK Campus > Faculty of Science > School of Psychology
Identification Number: https://doi.org/10.1111/sltb.12285
Depositing User: Eprints, Support
Date Deposited: 03 Aug 2016 08:14
Last Modified: 14 Sep 2016 12:25
URI: http://eprints.nottingham.ac.uk/id/eprint/35652

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