"Significantly more forensic psychiatric inpatients with tattoos had a diagnosis of anti-social personality disorder (ASPD) compared to patients without tattoos. Patients with ASPD also had a significantly greater number of tattoos, a trend toward having a greater percentage of their total body surface area tattooed, and were more likely to have a history of substance abuse than patients without ASPD. Tattooed subjects, with or without ASPD, were significantly more likely to have histories of substance abuse, sexual abuse and suicide attempts than non-tattooed patients......
Forensic psychiatric inpatients with tattoos should be assessed carefully for the presence of antisocial personality disorder as well as for substance abuse, sexual abuse and suicide attempts..."http://deepblue.lib.umich.edu/bitstream/2027.42/60449/1/43_ftp.pdf
and
"Tattooing no longer carries a negative social message. To investigate stigma related to employment, undergraduates rated how likely they would be to hire a young woman photographed with or without a butterfly tattoo for a front or back office job. Tattooed candidates were rated as less likely to be hired."
-"Perceived Stigma of Tattoos in Hiring Decisions"- Fiorilli