A multi-center authored data analysis of almost 700 survey in the Longitudinal Study of adolescent Health found a major association between endorsement of anabolic steroids and aggressiveness. The abstract, and reference are given here:
We examined the effects of anabolic-androgenic steroid use on serious violent behavior. Multivariate models based on data from the National Longitudinal Study of Adolescent Health (N=6823) were used to examine the association between lifetime and past-year self-reported anabolic-androgenic steroid use and involvement in violent acts. Compared with individuals who did not use steroids,young adult males who used anabolic-androgenic steroids reported greater involvement in violent behaviors after we controlled for the effects of key demographic variables,previous violent behavior,and polydrug use. (Am J Public Health. 2008;98:2185–2187. doi:10.2105/AJPH.2008.137018)
These findings fall in line with previous research on the issue. However, it should be noted that an association if not causal in itself. (no one would attempt the study doing a double blind placebo controlled study of high dose anabolic steroids affect on violence..that is with street doses).
Our results suggest that the use of anabolic androgenic steroids is related to heightened levels of violent behaviors. However, limitations must be considered. First, the measures of anabolic-androgenic steroid use were based on self-reports, not on direct measures as have been used by previous researchers.8 Another limitation of our study was that the measures of violent behavior were drawn from self-reports, which necessarily raises the question of whether the reports were reliable and accurate. With these limitations in mind, the current research suggests that the media attention and public concern surrounding anabolic-androgenic steroid use may be justified given its association with violence among males in the United States.