Preferences for Daily or Intermittent Pre-exposure Prophylaxis Regimens and Ability to Anticipate Sex Among HIV Uninfected Members of Kenyan HIV Serodiscordant Couples |
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Authors: | Sarah T Roberts Renee Heffron Kenneth Ngure Connie Celum Ann Kurth Kathryn Curran Nelly Mugo Jared M Baeten |
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Institution: | 1. Department of Epidemiology, University of Washington, Seattle, WA, USA 2. Department of Global Health, University of Washington, 325 Ninth Avenue, Box 359927, Seattle, WA, 98104, USA 3. Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya 4. Department of Medicine, University of Washington, Seattle, WA, USA 5. College of Nursing, New York University, New York, NY, USA 6. Kenya Medical Research Institute, Nairobi, Kenya
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Abstract: | Intermittent dosing for pre-exposure prophylaxis (PrEP) has been proposed as an alternative to daily PrEP to reduce cost and patient drug exposure and to improve adherence. One possible dosing regimen is pre-intercourse PrEP, which requires anticipating sex in advance. We examined preferences for daily versus pre-intercourse PrEP and ability to anticipate sex among 310 HIV uninfected members of HIV serodiscordant heterosexual couples in Thika, Kenya, with high HIV knowledge and experience with daily PrEP use in a clinical trial setting. Preferences were evenly split between daily PrEP (47.4 %) and pre-intercourse PrEP (50.7 %). Participants were more likely to prefer daily PrEP if they reported unprotected sex during the prior month (adjusted prevalence ratio aPR] 1.48, 95 % CI 1.20–1.81) or <80 % adherence to study drug (aPR 1.50, 95 % CI 1.25–1.79), and were less likely to prefer daily PrEP if sex was usually planned, versus spontaneous (aPR 0.76, 95 % CI 0.61–0.96). A minority (24.2 %) reported anticipating sex >3 h in advance, with younger participants being less likely to do so (aPR 0.43, 95 % CI 0.23–0.83 for ages 18–29 vs. ≥40). Findings suggest that intermittent PrEP could be a popular option in this population, but that optimal adherence and sufficient drug levels might be challenging with a pre-intercourse regimen. |
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