 Researchers have also noted that "there is strong empirical support for gender-specific, trauma-focused treatments".In one study, researchers offered 25 therapeutic group sessions to female inmates with mental health problems.It was found that the sessions were "successful at significantly decreasing post-traumatic stress disorder (PTSD) and substance use disorder (SUD) symptoms, with almost 50% of participants no longer meeting criteria for the disorder and 65% reporting no substance use at the 3-month follow up".