Brezo Jelena, Paris Joel, Hébert Martine, Vitaro Frank, Tremblay Richard, Turecki Gustavo
McGill Group for Suicide Studies, Douglas Hospital Research Center, Montreal, Canada.
BMC Psychiatry. 2008 Mar 6;8:15. doi: 10.1186/1471-244X-8-15.
Studying personality traits with the potential to differentiate between individuals engaging in suicide attempts of different degrees of severity could help us to understand the processes underlying the link of personality and nonfatal suicidal behaviours and to identify at-risk groups. One approach may be to examine whether narrow, i.e., lower-order personality traits may be more useful than their underlying, broad personality trait dimensions.
We investigated qualitative and quantitative differences in broad and narrow personality traits between one-time and repeated suicide attempters in a longitudinal, population-based sample of young French Canadian adults using two multivariate regression models.
One broad (Compulsivity: OR = 2.0; 95% CI 1.2-3.5) and one narrow personality trait (anxiousness: OR = 1.1; 95% CI 1.01-1.1) differentiated between individuals with histories of repeated and one-time suicide attempts. Affective instability [(OR = 1.1; 95% CI 1.04-1.1)] and anxiousness [(OR = .92; 95% CI .88-.95)], on the other hand, differentiated between nonattempters and one-time suicide attempters.
Emotional and cognitive dysregulation and associated behavioural manifestations may be associated with suicide attempts of different severity. While findings associated with narrow traits may be easier to interpret and link to existing sociobiological theories, larger effect sizes associated with broad traits such as Compulsivity may be better suited to objectives with a more clinical focus.
研究那些有可能区分不同严重程度自杀未遂个体的人格特质，有助于我们理解人格与非致命性自杀行为之间联系的潜在机制，并识别出高危群体。一种方法可能是检验狭义的，即低阶人格特质是否比其潜在的广义人格特质维度更有用。
我们使用两个多元回归模型，在一个基于人群的加拿大年轻法裔成年人纵向样本中，调查了单次和多次自杀未遂者在广义和狭义人格特质上的定性和定量差异。
一个广义人格特质（强迫性：比值比 = 2.0；95%置信区间 1.2 - 3.5）和一个狭义人格特质（焦虑：比值比 = 1.1；95%置信区间 1.01 - 1.1）能够区分有多次和单次自杀未遂史的个体。另一方面，情感不稳定（比值比 = 1.1；95%置信区间 1.04 - 1.1）和焦虑（比值比 = 0.92；95%置信区间 0.88 - 0.95）能够区分未尝试自杀者和单次自杀未遂者。
情绪和认知调节障碍以及相关的行为表现可能与不同严重程度的自杀未遂有关。虽然与狭义特质相关的发现可能更容易解释，并与现有的社会生物学理论相联系，但与强迫性等广义特质相关的更大效应量可能更适合以临床为重点的目标。
