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Financial incentives and deposit contracts to promote HIV retesting in Uganda: A randomized trial

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  • Gabriel Chamie
  • Dalsone Kwarisiima
  • Alex Ndyabakira
  • Kara Marson
  • Carol S Camlin
  • Diane V Havlir
  • Moses R Kamya
  • Harsha Thirumurthy

Abstract

Background: Frequent retesting for HIV among persons at increased risk of HIV infection is critical to early HIV diagnosis of persons and delivery of combination HIV prevention services. There are few evidence-based interventions for promoting frequent retesting for HIV. We sought to determine the effectiveness of financial incentives and deposit contracts in promoting quarterly HIV retesting among adults at increased risk of HIV. Methods and findings: In peri-urban Ugandan communities from October to December 2018, we randomized HIV–negative adults with self-reported risk to 1 of 3 strategies to promote HIV retesting: (1) no incentive; (2) cash incentives (US$7) for retesting at 3 and 6 months (total US$14); or (3) deposit contracts: participants could voluntarily deposit US$6 at baseline and at 3 months that would be returned with interest (total US$7) upon retesting at 3 and 6 months (total US$14) or lost if participants failed to retest. The primary outcome was retesting for HIV at both 3 and 6 months. Of 1,482 persons screened for study eligibility following community-based recruitment, 524 participants were randomized to either no incentive (N = 180), incentives (N = 172), or deposit contracts (N = 172): median age was 25 years (IQR: 22 to 30), 44% were women, and median weekly income was US$13.60 (IQR: US$8.16 to US$21.76). Among participants randomized to deposit contracts, 24/172 (14%) made a baseline deposit, and 2/172 (1%) made a 3-month deposit. In intent-to-treat analyses, HIV retesting at both 3 and 6 months was significantly higher in the incentive arm (89/172 [52%]) than either the control arm (33/180 [18%], odds ratio (OR) 4.8, 95% CI: 3.0 to 7.7, p

Suggested Citation

  • Gabriel Chamie & Dalsone Kwarisiima & Alex Ndyabakira & Kara Marson & Carol S Camlin & Diane V Havlir & Moses R Kamya & Harsha Thirumurthy, 2021. "Financial incentives and deposit contracts to promote HIV retesting in Uganda: A randomized trial," PLOS Medicine, Public Library of Science, vol. 18(5), pages 1-13, May.
  • Handle: RePEc:plo:pmed00:1003630
    DOI: 10.1371/journal.pmed.1003630
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    Cited by:

    1. Erev, Ido & Hiller, Maximilian & Klößner, Stefan & Lifshitz, Gal & Mertins, Vanessa & Roth, Yefim, 2022. "Promoting healthy behavior through repeated deposit contracts: An intervention study," Journal of Economic Psychology, Elsevier, vol. 92(C).

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