Objective: According to the hypothesis, the ratio of second finger (D2) to the fourth finger (D4) is negative correlated with intrauterine testosterone exposure but it has a positive correlation with intrauterine estrogen exposure. It is known that antisocial and impulsive behaviors are related with free testosterone level. In this study, correlation between D2:D4 ratios of patients with criminal antisocial personality disorder and scores of aggression scale were analyzed.
Methods: In this broad participation study, criminal antisocial, who had compliance problems had been analyzed and preliminary information will be shared, which also includes control group. The data of 106 criminal antisocials will have been compared with control group (n=100).
Results: D2:D4 ratio was measured from right hand. Right hand D2:D4 ratio of antisocial personality disorder group was measured as 0.97±0.04 and it was measured as 0.99±0.04 for control group. There was statistically difference between two groups (p<0.05, t=5.156). A negative correlation was determined between the hostility subscale scores of Buss-Perry Aggression Scale D2:D4 ratio of antisocial personality disorder group (for right hand r=-0.250, p<0.05), (for left hand r=-0.313, p<0.05).
Conclusions: As it is known, antisocial personality disorder is one of the psychiatric pathologies in which aggression is most apparent. Many studies have been carried on about correlations between antisocial personality disorder, testosterone and aggression. Particularly some studies in which there is no agreement on correlation between intrauterine testosterone exposure and aggression are still controversial. In studies related with this subject, lower D2:D4 ratio has been used as indicator of intrauterine testosterone. In some studies, a correlation was found between D2:D4 ratio and physical aggression but in some studies, it was not encountered a correlation like that. In our study, a negative correlation was found.