Imperial College London
Alternate

ProfessorMarie-ClaudeBoily

Faculty of Medicine, School of Public Health

Professor of Mathematical Epidemiology
 
 
 
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Contact

 

+44 (0)20 7594 3263mc.boily

 
 
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Location

 

LG26Norfolk PlaceSt Mary's Campus

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Summary

 

Publications

Citation

BibTex format

@article{Dimitrov:2020:cid/ciz799,
author = {Dimitrov, D and Moore, J and Wood, D and Mitchell, K and Li, M and Hughes, J and Donnell, D and Mannheimer, S and Holtz, T and Grant, R and Boily, MC},
doi = {cid/ciz799},
journal = {Clinical Infectious Diseases},
pages = {249--255},
title = {Predicted effectiveness of daily and non-daily PrEP for MSM based on sex and pill-taking patterns from HPTN 067/ADAPT},
url = {http://dx.doi.org/10.1093/cid/ciz799},
volume = {71},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Background: HPTN 067/ADAPT evaluated the feasibility of daily and non-daily HIV pre-exposure prophylaxis (PrEP) regimens among high-risk populations, including men who have sex with men (MSM) and transgender women, in Bangkok, Thailand and Harlem, New York, U.S. We used a mathematical model to predict the efficacy and effectiveness of different dosing regimens. Methods: An individual-based mathematical model was used to simulate annual HIV incidence among MSM cohorts. PrEP efficacy for covered sex acts, as defined in the HPTN 067/ADAPT protocol, was estimated using subgroup efficacy estimates from the iPrEx trial. Effectiveness was estimated by comparison of the HIV incidence with and without PrEP use.Results: We estimated that PrEP was highly protective (85%–96% efficacy across regimens and sites) for fully covered acts. PrEP was more protective for partially covered acts in Bangkok (71%–88% efficacy) than in Harlem (62%–81% efficacy). Our model projects 80%, 62%, and 68% effectiveness of daily, time-driven, and event-driven PrEP for MSM in Harlem compared with 90%, 85% and 79% for MSM in Bangkok. Halving the efficacy for partially covered acts decreases effectiveness by 8–9 percentage points in Harlem and by 5–9 percentage points in Bangkok across regimens. Conclusions: Our analysis suggests that PrEP was more effective among MSM in Thailand than in the U.S. as a result of more fully covered sex acts and more pills taken around partially covered acts. Overall, non-daily PrEP was less effective than daily PrEP, especially in the U.S. where the sex act coverage associated with daily use was substantially higher.
AU  - Dimitrov,D
AU  - Moore,J
AU  - Wood,D
AU  - Mitchell,K
AU  - Li,M
AU  - Hughes,J
AU  - Donnell,D
AU  - Mannheimer,S
AU  - Holtz,T
AU  - Grant,R
AU  - Boily,MC
DO  - cid/ciz799
EP  - 255
PY  - 2020///
SN  - 1058-4838
SP  - 249
TI  - Predicted effectiveness of daily and non-daily PrEP for MSM based on sex and pill-taking patterns from HPTN 067/ADAPT
T2  - Clinical Infectious Diseases
UR  - http://dx.doi.org/10.1093/cid/ciz799
UR  - http://hdl.handle.net/10044/1/71919
VL  - 71
ER  -
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