Lee Kounseok, Lee Hye-Kyung, Kim Seok Hyeon
Department of Psychiatry, St. Andrew's Hospital, Icheon, Republic of Korea; Institute of Mental Health, Hanyang University, Seoul, Republic of Korea.
Department of Nursing, College of Nursing and Health, Kongju National University, Gongju, Republic of Korea.
J Affect Disord. 2017 Oct 15;221:198-204. doi: 10.1016/j.jad.2017.06.025. Epub 2017 Jun 13.
Suicide is a major cause of death in university students. Personality traits have been suggested as possible risk factors for suicidal behaviors. This study looked at the relationship between the personality dimensions of the Temperament and Character Inventory (TCI) and suicidal behaviors.
A total of 5644 college students took the TCI test and the suicidality module of the M.I.N.I. The students were divided into the suicidal ideation group (n = 302; 5.4%) and the suicide attempt group (n = 301; 5.3%). Each group's TCI dimension and sub-dimension scores were compared with one another. To find out which TCI dimension affects suicide risk when depressed, regression analysis and mediation analysis were conducted.
First, we adjusted for age, sex and depressive mood and compared the TCI scores of the participants based on their suicide risk. After the adjustment, self-directedness decreased in the suicidal ideation group while novelty seeking and persistence increased in the suicide attempt group. It turned out that self-directedness has a partial mediating effect between depressive symptom and suicide risk (β = -0.068 P < 0.001).
We adjusted for depressive mood and it turned out that the suicidal ideation group is affected by character whereas the suicide attempt group is affected by temperament. Among the character dimensions, self-directedness was found to reduce the effect of depressive mood on suicide risk. Therefore, when evaluating suicide risk, assessing character dimensions, especially self-directedness along with depressive mood, a risk factor, will be helpful.
自杀是大学生死亡的主要原因。人格特质被认为是自杀行为可能的风险因素。本研究探讨了气质与性格问卷（TCI）的人格维度与自杀行为之间的关系。
共有5644名大学生参加了TCI测试和迷你国际神经精神访谈（M.I.N.I.）的自杀模块。学生们被分为自杀意念组（n = 302；5.4%）和自杀未遂组（n = 301；5.3%）。比较了每组的TCI维度和子维度得分。为了找出抑郁时哪些TCI维度会影响自杀风险，进行了回归分析和中介分析。
首先，我们对年龄、性别和抑郁情绪进行了校正，并根据参与者的自杀风险比较了他们的TCI得分。校正后，自杀意念组的自我导向性降低，而自杀未遂组的寻求新奇和坚持性增加。结果表明，自我导向性在抑郁症状和自杀风险之间具有部分中介作用（β = -0.068，P < 0.001）。
我们校正了抑郁情绪，结果发现自杀意念组受性格影响，而自杀未遂组受气质影响。在性格维度中，发现自我导向性可降低抑郁情绪对自杀风险的影响。因此，在评估自杀风险时，评估性格维度，尤其是自我导向性以及作为风险因素的抑郁情绪，将有所帮助。
