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Character configuration, major depressive episodes, and suicide-related ideation among Japanese undergraduates

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Title: Character configuration, major depressive episodes, and suicide-related ideation among Japanese undergraduates
Authors: Takanobu, Keisuke Browse this author
Mitsui, Nobuyuki Browse this author
Watanabe, Shinya Browse this author
Toyoshima, Kuniyoshi Browse this author
Fujii, Yutaka Browse this author
Kako, Yuki Browse this author
Asakura, Satoshi Browse this author
Kusumi, Ichiro Browse this author →KAKEN DB
Issue Date: 12-May-2021
Publisher: PLOS
Journal Title: PLoS ONE
Volume: 16
Issue: 5
Start Page: e0251503
Publisher DOI: 10.1371/journal.pone.0251503
Abstract: Aim To enable early identification of university students at high risk for suicide, we examined personality as a predictive factor for major depressive episodes and suicide-related ideation. Methods From 2011 to 2013, we administered the Patient Health Questionnaire-9 (PHQ-9) and the Temperament and Character Inventory (TCI) to 1,997 university students at enrollment (T1). We previously conducted a study using the same data set; this is a re-analysis of the dataset. To prevent contamination of data, participants diagnosed with a depressive episode were excluded at T1. Three years after enrollment (T2), we re-administered the PHQ-9 to the same students. We statistically compared TCI scores at T1 among depressive episode groups and suicide-related ideation groups. Two-way ANOVA and Cochran-Armitage trend tests were used to analyze the relationships between personality traits, depressive episodes, and suicide-related ideation. Results The PHQ-9 summary scores at baseline (T1) were 3.0 (2.7), with female students scoring 4.6 (+/- 2.9) and male students 2.9 (+/- 2.6, p = 0.025). The major depressive episode group at T2 had lower self-directedness (SD) scores at T1 than the non-depressive episode control group. The suicide-related ideation (SI) group at T2 also had higher harm avoidance (HA), lower SD, and lower cooperativeness (C) scores than the non-SI group at T1. The Cochran-Armitage trend tests revealed significant associations between character configurations composed of SD and C, and both depressive episodes at T2 and SI at T2. Conclusion The temperament feature of high HA at baseline and character configurations of low SD and low C at baseline are the most contributory predictors for the novel development of depressive episodes and SI among Japanese university students.
Type: article
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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