Tsukasa Kato1. 1. Department of Social Psychology, Toyo University, 5-28-20 Hakusan, Bunkyo-ku, Tokyo, 112-8606, Japan, mtsukasa@hotmail.com.
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.
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.
Authors: Carolyn L Turvey; Yeates Conwell; Michael P Jones; Caroline Phillips; Eleanor Simonsick; Jane L Pearson; Robert Wallace Journal: Am J Geriatr Psychiatry Date: 2002 Jul-Aug Impact factor: 4.105
Authors: Runtang Meng; Tsukasa Kato; Stefanos Mastrotheodoros; Lu Dong; Daniel Yee Tak Fong; Fang Wang; Menglu Cao; Xinliang Liu; Chenmin Yao; Jinhong Cao; Yong Yu; Yi Luo; Chuanhua Yu; David Gozal Journal: Qual Life Res Date: 2022-09-20 Impact factor: 3.440