title: Willingness to Use Pre-Exposure Prophylaxis (PrEP): An Empirical Test of the Information-Motivation-Behavioral Skills (IMB) Model among High-Risk Drug Users in Treatment.
abstract: Evidence from recent pre-exposure prophylaxis (PrEP) trials has demonstrated its safety and efficacy in significantly reducing the risk of HIV acquisition for those who are at considerable risk of acquiring HIV infection. With a rapid increase in the amount of research on the efficacy of PrEP for HIV prevention, complementary research on the willingness to use PrEP has grown, especially among MSM, but limited research has been focused among people who use drugs (PWUD). As part of the formative process, we utilized the information-motivation-behavioral skills (IMB) model of health behavior change to characterize and guide intervention development for promoting willingness to use PrEP among high-risk PWUD. The analysis included 400 HIV-negative high-risk PWUD enrolled in a community-based methadone maintenance treatment who reported drug- and/or sex-related HIV risk behaviors in the past 6-months. Analyses revealed support for the IMB model as PrEP-related behavioral skills were found to mediate the influence of PrEP-related information and motivation on willingness to use PrEP. The results provide evidence as to the utility of the IMB model to increase willingness to use PrEP among high-risk PWUD. It therefore makes an important contribution to our understanding of the applicability of theoretically-grounded models of willingness to use PrEP among high-risk PWUD, who are one of the key risk populations who could benefit from the use of PrEP.
authors.affiliation: Department of Community Medicine and Health Care, University of Connecticut Health Center, 263 Farmington Avenue, MC 6325, Farmington, CT, 06030-6325, USA. Roman.Shrestha@UConn.edu.|Institute for Collaboration on Health, Intervention, and Policy, University of Connecticut, Storrs, CT, USA. Roman.Shrestha@UConn.edu.
authors.forename: Roman
authors.identifier: http://orcid.org/0000-0003-4340-3101
authors.initials: R
authors.lastname: Shrestha
authors.affiliation: Institute for Collaboration on Health, Intervention, and Policy, University of Connecticut, Storrs, CT, USA.|Department of Internal Medicine, AIDS Program, Yale University School of Medicine, New Haven, CT, USA.
authors.forename: Frederick L
authors.initials: FL
authors.lastname: Altice
authors.affiliation: Institute for Collaboration on Health, Intervention, and Policy, University of Connecticut, Storrs, CT, USA.|Department of Allied Health Sciences, University of Connecticut, Storrs, CT, USA.
authors.forename: Tania B
authors.initials: TB
authors.lastname: Huedo-Medina
authors.affiliation: Institute for Collaboration on Health, Intervention, and Policy, University of Connecticut, Storrs, CT, USA.|Department of Allied Health Sciences, University of Connecticut, Storrs, CT, USA.
authors.forename: Pramila
authors.initials: P
authors.lastname: Karki
authors.affiliation: Institute for Collaboration on Health, Intervention, and Policy, University of Connecticut, Storrs, CT, USA.|Department of Allied Health Sciences, University of Connecticut, Storrs, CT, USA.
authors.forename: Michael
authors.initials: M
authors.lastname: Copenhaver
mesh_terms: D000328:Adult; D001521:Behavior Therapy; D003430:Cross-Sectional Studies; D055030:Drug Users / Q000193:education* / Q000523:psychology*; D005260:Female; D015658:HIV Infections / Q000517:prevention & control* / Q000523:psychology* / Q000635:transmission; D006266:Health Education; D006801:Humans; D008297:Male; D008691:Methadone / Q000627:therapeutic use; D008875:Middle Aged; D008960:Models, Psychological; D009042:Motivation; D009294:Narcotics; D058850:Opiate Substitution Treatment; D010342:Patient Acceptance of Health Care / Q000523:psychology*; D065129:Pre-Exposure Prophylaxis; D047568:Unsafe Sex; D055815:Young Adult
chemical_list: D009294:Narcotics; D008691:Methadone
keywords: HIV; IMB model; People who use drugs; Pre-exposure prophylaxis; Structural equation modeling; Substance use