Batty G David, Deary Ian J, Tengstrom Anders, Rasmussen Finn
MRC Social & Public Health Sciences Unit, University of Glasgow, Glasgow, UK.
Br J Psychiatry. 2008 Dec;193(6):461-5. doi: 10.1192/bjp.bp.107.037424.
Risk factors for homicide are emerging; however, the predictive value of IQ, for which there is a strong prima facie case, has yet to be examined.
To examine the association between IQ and risk of death by homicide.
A cohort of 968 846 men, aged 18-19 years, were administered an IQ test battery at military conscription and then followed for mortality experience over two decades.
There were 191 deaths due to homicide during follow-up. In age-adjusted analyses, a high total IQ test score was associated with a reduced rate of homicide (hazard ratio (HR) per standard deviation increase in IQ score=0.49, 95% CI 0.42-0.57). A step-wise gradient was apparent across the three IQ groups (P-value for trend <0.001). After adjustment for indicators of socio-economic position and illness at conscription, this gradient was marginally attenuated (HR=0.57, 95% CI 0.49-0.67).
High IQ test scores in early adulthood were associated with a reduced risk of death by homicide.
杀人行为的风险因素正在逐渐显现；然而，智商的预测价值虽有强有力的初步证据，但尚未得到检验。
研究智商与杀人致死风险之间的关联。
对968846名年龄在18至19岁的男性进行队列研究，他们在征兵时接受了一系列智商测试，随后对其长达二十年的死亡情况进行随访。
随访期间有191人死于杀人行为。在年龄调整分析中，智商测试总分较高与杀人致死率降低相关（智商分数每增加一个标准差，风险比（HR）=0.49，95%置信区间0.42 - 0.57）。在三个智商组中呈现出明显的逐步梯度（趋势P值<0.001）。在对征兵时的社会经济地位和疾病指标进行调整后，这种梯度略有减弱（HR = 0.57，95%置信区间0.49 - 0.67）。
成年早期智商测试得分高与杀人致死风险降低相关。
