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Effects of a Lottery Incentive on Sexually Transmitted Infections and HIV Incidence among Female Sex Workers in Tanzania: Results from the RESPECT II Randomized Trial

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dc.contributor.authorBalampama, Marianna
dc.contributor.authorde Walque, Damien
dc.contributor.authorDow, William H.
dc.contributor.authorHémono, Rebecca
dc.date.accessioned2023-09-26T13:35:34Z
dc.date.available2023-09-26T13:35:34Z
dc.date.issued2023-09-26
dc.description.abstractFemale sex workers are a key population who experience a disproportionately high burden of HIV and sexually transmitted infections. A growing body of evidence suggests that financial incentives can reduce risky sexual behavior and the incidence of HIV and sexually transmitted infections; however, few studies have examined a lottery-based incentive mechanism or been conducted with female sex workers. This paper examines the effect of a lottery intervention on the combined incidence of HIV and herpes simplex virus 2 among female sex workers in Tanzania. The RESPECT II trial was an unmasked, two-arm, parallel group randomized controlled trial conducted in Dar es Salaam, Tanzania among 2,206 enrollees from 2018 to 2021. Participants were randomized in a one-to-one ratio to the basic test control group or to the lottery intervention group. The basic test group received testing and counseling for HIV and biweekly text messages with information on safe sex practices. The lottery group received the basic test group intervention plus entry into a weekly lottery with a 100,000 Tanzanian shilling (US$50) reward offered to 10 randomly selected participants, conditional on negative test results for syphilis and trichomonas. The primary outcome was combined HIV and herpes simplex virus 2 incidence after 36 months. The results showed no statistically significant effect on this primary outcome. Thus the study finds no evidence that the lottery-based incentives reduced the incidence of HIV and sexually transmitted infections among the female sex worker population. However, the results may have been affected by disruption from the COVID-19 pandemic, and unexpectedly high study attrition levels made it impossible to statistically rule out possible moderate-sized effects.en
dc.identifierhttp://documents.worldbank.org/curated/en/099428309252326332/IDU08c3a9fc50f8b6041ec08d0f0637e616ccd54
dc.identifier.doi10.1596/1813-9450-10571
dc.identifier.urihttps://openknowledge.worldbank.org/handle/10986/40395
dc.languageEnglish
dc.language.isoen
dc.publisherWorld Bank, Washington, DC
dc.relation.ispartofseriesPolicy Research Working Paper; 10571
dc.rightsCC BY 3.0 IGO
dc.rights.holderWorld Bank
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/igo/
dc.subjectFEMALE SEX WORKER INTERVENTION
dc.subjectLOTTERY
dc.subjectINCENTIVE
dc.subjectHIV
dc.titleEffects of a Lottery Incentive on Sexually Transmitted Infections and HIV Incidence among Female Sex Workers in Tanzaniaen
dc.title.subtitleResults from the RESPECT II Randomized Trialen
dc.typeWorking Paper
dspace.entity.typePublication
okr.crossref.titleEffects of a Lottery Incentive on Sexually Transmitted Infections and HIV Incidence among Female Sex Workers in Tanzania: Results from the RESPECT II Randomized Trial
okr.date.disclosure2023-09-25
okr.date.doiregistration2025-04-07T08:30:57.264509Z
okr.date.doiregistration2025-04-08T16:14:40.448887Z
okr.date.doiregistration2025-04-09T02:47:01.633541Z
okr.date.lastmodified2023-09-25T00:00:00Zen
okr.doctypePolicy Research Working Paper
okr.doctypePublications & Research
okr.docurlhttp://documents.worldbank.org/curated/en/099428309252326332/IDU08c3a9fc50f8b6041ec08d0f0637e616ccd54
okr.guid099428309252326332
okr.identifier.docmidIDU-8c3a9fc5-f8b6-41ec-8d0f-637e616ccd54
okr.identifier.doi10.1596/1813-9450-10571
okr.identifier.externaldocumentum34168234
okr.identifier.internaldocumentum34168234
okr.identifier.reportWPS10571
okr.import.id1847
okr.importedtrueen
okr.language.supporteden
okr.pdfurlhttp://documents.worldbank.org/curated/en/099428309252326332/pdf/IDU08c3a9fc50f8b6041ec08d0f0637e616ccd54.pdfen
okr.region.administrativeAfrica Eastern and Southern (AFE)
okr.region.countryTanzania
okr.sectorHealth-HG
okr.themeHIV/AIDS,Human Development and Gender,Social Protection,Social Development and Protection,Reproductive and Maternal Health,Disease Control,Health Systems and Policies,Social Safety Nets
okr.topicHealth, Nutrition and Population::Public Health Promotion
okr.topicHealth, Nutrition and Population::Communicable Diseases
okr.topicHealth, Nutrition and Population::HIV AIDS
okr.unitDECRG: Human Development (DECHD)
relation.isAuthorOfPublicationb5740416-f4ef-5235-974a-47bd257d61a4
relation.isAuthorOfPublication.latestForDiscoveryb5740416-f4ef-5235-974a-47bd257d61a4
relation.isSeriesOfPublication26e071dc-b0bf-409c-b982-df2970295c87
relation.isSeriesOfPublication.latestForDiscovery26e071dc-b0bf-409c-b982-df2970295c87
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