Citation

Kato T. Int. J. Behav. Med. 2014; 21(3): 506-510.

Affiliation

Department of Social Psychology, Toyo University, 5-28-20 Hakusan, Bunkyo-ku, Tokyo, 112-8606, Japan, mtsukasa@hotmail.com.

Copyright

(Copyright © 2014, International Society of Behavioral Medicine, Publisher Holtzbrinck Springer Nature Publishing Group)

DOI

10.1007/s12529-013-9364-4

PMID

24136401

Abstract

BACKGROUND: Although poor sleep quality is the most common subjective complaint of workers and is a risk factor for depressive symptoms and suicide, researchers have not yet provided definitive links between insomnia symptoms, depressive symptoms, and suicide. PURPOSE: In our mediation model, we hypothesized relationships among insomnia symptoms, depressive symptoms, and suicide ideation. The purpose here was to use structural equation modeling (SEM) to test our mediation model. METHOD: Three hundred forty-three Japanese full-time white-collar workers completed the measures to assess insomnia symptoms, depressive symptoms, and suicide ideation over an approximately 3-month period. RESULTS: A SEM analysis revealed that insomnia symptoms were positively and significantly associated with depressive symptoms, and depressive symptoms were positively and significantly associated with suicide ideation. Two tests showed a significant indirect effect of insomnia symptoms on suicide ideation through depressive symptoms. Thus, these results supported our mediation model. CONCLUSION: We conclude that insomnia symptoms were positively associated with suicidal ideation, though this relation was accounted for by depressive symptoms in Japanese white-collar workers.

Language: en