Non-consensual sex experienced by men who have sex with men: prevalence and association with mental health.

Little is known about the psychosocial factors associated with sexual assault experienced by males. Men (N=358), 19-35 years of age, recruited by community outreach, completed questionnaires. Eligibility criteria included: being HIV-negative and self-identifying as gay or bisexual.

Willingness to participate and enroll in a phase 3 preventive HIV-1 vaccine trial.

Objectives: To assess the extent to which HIV-negative cohort study participants would be willing to participate (WTP) in future HIV vaccine trials, to explore enrollment into an ongoing phase 3 HIV vaccine trial, and to assess changing WTP in such trials over time.

Methods: The Vanguard Project is a prospective study of gay and bisexual men in the greater Vancouver region, British Columbia, Canada. Sociodemographic characteristics, sexual risk behavior, beliefs around HIV, and reasons for not participating in the AIDSVAX B/B trial were collected from self-administered questionnaires.