Singh Piyoosh Kumar, Rao V R
Department of Psychiatry, All India Institute of Medical Sciences, New Delhi, India.
ICMR Emeritus Medical Scientist, Dept of Genetics, Osmania University, Hyderabad, India.
PLoS One. 2018 Feb 15;13(2):e0192969. doi: 10.1371/journal.pone.0192969. eCollection 2018.
Suicide is a spectrum of behavior including suicide ideation and suicidal attempt and is undoubtedly the outcome of the interaction of several factors. The role of two main constructs of human nature, aggression and impulsivity, has been discussed broadly in relation to suicide, as endophenotypes or traits of personality, in research and in clinical practice across diagnoses. The objective of our study was to assess impulsive and aggressive behaviors among primitive people of the Idu Mishmi tribe, who are known for high suicide completer and attempter rates.
The study group was comprised of 177 unrelated Idu Mishmi participants divided into two sets: 39 suicide attempters and 138 non-attempters. Data on demographic factors and details of suicide attempts were collected. Participants completed a set of instruments for assessment of aggression and impulsivity traits.
In the Idu Mishimi population we screened (n = 177), 22.03% of the individuals had attempted suicide, a high percentage. The suicide attempters also showed a significant sex difference: 35.9% were male and 64.10% were female (p = .002*). The suicide attempters (A) scored significantly higher than non-attempters (NA) on aggression (A = 23.93,NA = 18.46) and impulsivity (A = 75.53,NA = 71.59, with p value = 0.05). The trait impulsiveness showed a significantly higher difference (F (1, 117) = 7.274) in comparison to aggression (F (1, 117) = 2.647), suggesting a profound role of impulsiveness in suicide attempts in the Idu Mishmi population. Analysis of sub-traits of aggression and impulsivity revealed significant correlations between them. Using different models, multivariate logistic regression implied roles of gender (OR = 1.079 (0.05)) and impulsiveness (OR = 3.355 (0.013)) in suicide attempts.
Results demonstrate that gender and impulsivity are strong risk factors for suicide attempts in the Idu Mishmi population.
自杀是一系列行为，包括自杀意念和自杀未遂，无疑是多种因素相互作用的结果。作为内表型或人格特质，人性的两个主要构成要素——攻击性和冲动性，在研究和跨诊断的临床实践中，已围绕自杀进行了广泛讨论。我们研究的目的是评估以高自杀完成率和未遂率而闻名的伊杜米什米部落原住民中的冲动行为和攻击行为。
研究组由177名无亲属关系的伊杜米什米参与者组成，分为两组：39名自杀未遂者和138名非自杀未遂者。收集了人口统计学因素数据和自杀未遂细节。参与者完成了一组用于评估攻击性和冲动性特质的工具。
在我们筛查的伊杜米什米人群（n = 177）中，22.03%的个体曾试图自杀，这一比例很高。自杀未遂者还表现出显著的性别差异：男性占35.9%，女性占64.10%（p = .002*）。自杀未遂者（A）在攻击性（A = 23.93，非自杀未遂者（NA）= 18.46）和冲动性（A = 75.53，NA = 71.59，p值 = 0.05）方面的得分显著高于非自杀未遂者。与攻击性（F（1, 117） = 2.647）相比，特质冲动性表现出显著更高的差异（F（1, 117） = 7.274），表明冲动性在伊杜米什米人群的自杀未遂中起重要作用。对攻击性和冲动性的子特质分析显示它们之间存在显著相关性。使用不同模型，多因素逻辑回归表明性别（OR = 1.079（0.05））和冲动性（OR = 3.355（0.013））在自杀未遂中起作用。
结果表明，性别和冲动性是伊杜米什米人群自杀未遂的强烈风险因素。
