title: Sexual frequency and planning among at-risk men who have sex with men in the United States:  implications for event-based intermittent pre-exposure prophylaxis.
abstract: Intermittent dosing of pre-exposure prophylaxis (iPrEP) has potential to decrease costs, improve adherence, and minimize toxicity. Practical event-based dosing of iPrEP requires men who have sex with men (MSM) to be sexually active on fewer than 3 days each week and plan for sexual activity. MSM who may be most suitable for event-based dosing were older, more educated, more frequently used sexual networking websites, and more often reported that their last sexual encounter was not with a committed partner. A substantial proportion of these MSM endorse high-risk sexual activity, and event-based iPrEP may best target this population.
authors.affiliation: Department of Public Health, HIV Research Section, San Francisco, CA, USA. jonathan.volk@ucsf.edu
authors.forename: Jonathan E
authors.initials: JE
authors.lastname: Volk
authors.forename: Albert
authors.initials: A
authors.lastname: Liu
authors.forename: Eric
authors.initials: E
authors.lastname: Vittinghoff
authors.forename: Risha
authors.initials: R
authors.lastname: Irvin
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Kroboth
authors.forename: Douglas
authors.initials: D
authors.lastname: Krakower
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Mimiaga
authors.forename: Kenneth H
authors.initials: KH
authors.lastname: Mayer
authors.forename: Patrick S
authors.initials: PS
authors.lastname: Sullivan
authors.forename: Susan P
authors.initials: SP
authors.lastname: Buchbinder
mesh_terms: D000293:Adolescent; D000328:Adult; D044966:Anti-Retroviral Agents / Q000008:administration & dosage*; D018890:Chemoprevention / Q000379:methods*; D015658:HIV Infections / Q000517:prevention & control*; D018451:Homosexuality, Male; D006801:Humans; D008297:Male; D012306:Risk; D055815:Young Adult
chemical_list: D044966:Anti-Retroviral Agents