Afrisham Reza, Sadegh-Nejadi Sahar, SoliemaniFar Omid, Kooti Wesam, Ashtary-Larky Damoon, Alamiri Fatima, Aberomand Mohammad, Najjar-Asl Sedigheh, Khaneh-Keshi Ali
Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.; Department of Clinical Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
Department of Human Sciences, Khuzestan Farhangian University, Ahvaz, Iran.
Psychiatry Investig. 2016 Nov;13(6):637-643. doi: 10.4306/pi.2016.13.6.637. Epub 2016 Nov 24.
The purpose of this study was to evaluate the salivary testosterone levels under psychological stress and its relationship with rumination and five personality traits in medical students.
A total of 58 medical students, who wanted to participate in the final exam, were selected by simple random sampling. Two months before the exam, in the basal conditions, the NEO Inventory short form, and the Emotional Control Questionnaire (ECQ) were completed. Saliva samples were taken from students in both the basal conditions and under exam stress. Salivary testosterone was measured by ELISA. Data was analyzed using multivariate analysis of variance with repeated measures, paired samples t-test, Pearson correlation and stepwise regression analysis.
Salivary testosterone level of men showed a significant increase under exam stress (p<0.05). However, a non-significant although substantial reduction observed in women. A significant correlation was found between extroversion (r=-0.33) and openness to experience (r=0.30) with salivary testosterone (p<0.05). Extraversion, aggression control and emotional inhibition predicted 28% of variance of salivary testosterone under stress.
Salivary testosterone reactivity to stress can be determined by sexual differences, personality traits, and emotional control variables which may decrease or increase stress effects on biological responses, especially the salivary testosterone.
本研究旨在评估医学生在心理压力下的唾液睾酮水平及其与沉思和五种人格特质的关系。
通过简单随机抽样选取了58名想要参加期末考试的医学生。在考试前两个月，在基础条件下，完成了NEO人格量表简版和情绪控制问卷（ECQ）。在基础条件和考试压力下均采集了学生的唾液样本。采用酶联免疫吸附测定法（ELISA）测量唾液睾酮。使用重复测量的多因素方差分析、配对样本t检验、Pearson相关性分析和逐步回归分析对数据进行分析。
男性的唾液睾酮水平在考试压力下显著升高（p<0.05）。然而，女性虽有大幅下降但未达到显著水平。外向性（r=-0.33）和经验开放性（r=0.30）与唾液睾酮之间存在显著相关性（p<0.05）。外向性、攻击性控制和情绪抑制可预测压力下唾液睾酮28%的变异。
唾液睾酮对压力的反应性可由性别差异、人格特质和情绪控制变量决定，这些因素可能会降低或增加压力对生物反应的影响，尤其是对唾液睾酮的影响。
