Correlation between personality traits and testosterone concentrations in healthy population

Objective: High plasma testosterone levels have been associated with aggression, sexual behaviour and social status. The aim of this paper was to study the correlation between basal plasma testosterone levels and personality variables in healthy participants. Materials and Methods: Fifty-four participants were randomly enrolled into this study. Basal plasma testosterone levels were measured between 8:30 am and 10 am. After 24 hours of blood drawing, each subject completed personality questionnaires. Results: Positive correlation between basal plasma testosterone levels and anti-social personality traits in both genders was observed ( r = 0.336 and P r = 0. 376, P r = 0.386, P r = 0. 25, P r = 0.507, P r = 0. 544, P r = 0. 485, P r = 0.632, P Conclusion: Our results suggest gender differences in clinical and personality variables related with basal plasma testosterone level. In men, high plasma testosterone levels were associated with clinical traits, substance abuse and hypomania. Women with higher basal testosterone levels showed higher scores on personality self-direction traits.