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Published in: BMC Psychiatry 1/2018

Open Access 01-12-2018 | Research article

Depression and the relationship between sleep disturbances, nightmares, and suicidal ideation in treatment-seeking Canadian Armed Forces members and veterans

Authors: J. Don Richardson, Lisa King, Kate St. Cyr, Philippe Shnaider, Maya L. Roth, Felicia Ketcheson, Ken Balderson, Jon D. Elhai

Published in: BMC Psychiatry | Issue 1/2018

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Abstract

Background

Research on the relationship between insomnia and nightmares, and suicidal ideation (SI) has produced variable findings, especially with regard to military samples. This study investigates whether depression mediated the relationship between: 1) sleep disturbances and SI, and 2) trauma-related nightmares and SI, in a sample of treatment-seeking Canadian Armed Forces (CAF) personnel and veterans (N = 663).

Method

Regression analyses were used to investigate associations between sleep disturbances or trauma-related nightmares and SI while controlling for depressive symptom severity, posttraumatic stress disorder (PTSD) symptom severity, anxiety symptom severity, and alcohol use severity. Bootstrapped resampling analyses were used to investigate the mediating effect of depression.

Results

Approximately two-thirds of the sample (68%; N = 400) endorsed sleep disturbances and 88% (N = 516) reported experiencing trauma-related nightmares. Although sleep disturbances and trauma-related nightmares were both significantly associated with SI on their own, these relationships were no longer significant when other psychiatric conditions were included in the models. Instead, depressive symptom severity emerged as the only variable significantly associated with SI in both equations. Bootstrap resampling analyses confirmed a significant mediating role of depression for sleep disturbances.

Conclusions

The findings suggest that sleep disturbances and trauma-related nightmares are associated with SI as a function of depressive symptoms in treatment-seeking CAF personnel and veterans. Treating depression in patients who present with sleep difficulties may subsequently help mitigate suicide risk.
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Metadata
Title
Depression and the relationship between sleep disturbances, nightmares, and suicidal ideation in treatment-seeking Canadian Armed Forces members and veterans
Authors
J. Don Richardson
Lisa King
Kate St. Cyr
Philippe Shnaider
Maya L. Roth
Felicia Ketcheson
Ken Balderson
Jon D. Elhai
Publication date
01-12-2018
Publisher
BioMed Central
Published in
BMC Psychiatry / Issue 1/2018
Electronic ISSN: 1471-244X
DOI
https://doi.org/10.1186/s12888-018-1782-z

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