title: Correlation Between Personality Traits and Testosterone Concentrations in Healthy Population.
abstract: 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.
  
  
  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 < 0.018). Also, a positive correlation was observed between basal plasmatestosterone levels and criminal thinking traits (r = 0. 376, P < 0.05) and Millon compulsive (r = 0.386, P < 0.010) in both genders. In female participants, a positive correlation between basal plasmatestosterone levels and psychoticism (r = 0. 25, P < 0.019) and Cloninger AUTO TCI (r = 0.507, P < 0.004) was observed. In males participants positive correlation between baseline plasmatic Testosterone levels and Millon Antisocial trait (r = 0. 544, P < 0.19) and Millon Hypomania trait (r = 0. 485, P < 0.41) and Millon Drug Abuse trait (r = 0.632, P < 0.05) was reported.
  
  
  CONCLUSIONS
  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.
authors.affiliation: Department of Psychiatry, Foundation Alcorcon University Hospital, Madrid, Spain.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Tajima-Pozo
authors.affiliation: Institute of Psychiatry and Mental Health, San Carlos University Hospital, Madrid, Spain.
authors.forename: Camila
authors.initials: C
authors.lastname: Bayón
authors.affiliation: Institute of Psychiatry and Mental Health, San Carlos University Hospital, Madrid, Spain.
authors.forename: Marina
authors.initials: M
authors.lastname: Díaz-Marsá
authors.affiliation: Institute of Psychiatry and Mental Health, San Carlos University Hospital, Madrid, Spain.
authors.forename: Jose Luis
authors.initials: JL
authors.lastname: Carrasco
keywords: Anti-social behavior; gender differences; hypomania; personality traits; testosterone