"Most college victims are assaulted by someone they know – and parties are often the site of these crimes. Notably, campus assailants are often serial offenders: one study found that of the men who admitted to committing rape or attempted rape, some 63% said they committed an average of six rapes each. College sexual assault survivors suffer from high levels of mental health problems (like depression and PTSD) and drug and alcohol abuse. Reporting rates are also particularly low."
Rape and Sexual Assault: A Renewed Call to Action (via to-the-sa-task-force)