Revealing a safer sex option to reduce HIV risk: a cluster-randomized trial in Botswana

Show simple item record Angrist, Noam Matshaba, Mogomotsi Gabaitiri, Lesego Anabwani, Gabriel 2019-07-22T16:35:18Z 2019-07-22T16:35:18Z 2019
dc.description.abstract Background: 1.8 million new HIV infections occur every year, disproportionately affecting adolescent girls and young women. Abstinence-only risk avoidance approaches have had limited impact on reducing new infections. This cluster-randomized trial examines a risk reduction approach to curbing risky sex for school-going girls in Botswana. Methods: The unit of randomization was the school (n = 229). Intervention participants received a 1-h intervention revealing a safer sex option: dating same-age partners which have 5-9x lower HIV prevalence than older partners. Primary outcomes were pregnancy as a proxy for unprotected sex and HIV. Secondary outcomes included selfreported sexual behavior. Generalized linear multilevel models with school-level robust variance for adjusted relative risk ratios were used in an intention-to-treat analysis. Results: At a 12-month follow up, the intervention reduced pregnancy with an adjusted Relative Risk Ratio (aRRR) of .657 [95% CI .433–.997] significant at the 5% level. Effects were largest at junior school (aRRR = .575 [95% CI .394–. 841]) and in rural areas (aRRR = .518 [95% CI .323–.831]), significant at the 1% level. There were no significant effects for primary school students, suggesting age of sexual debut and related mechanisms are critical factors in the intervention’s effectiveness. Moreover, baseline beliefs of which partner is riskiest mediate the magnitude of effects. Conclusions: Information on safe sex options can change sexual behavior. The success of the intervention working across contexts will depend on various factors, such as age of sexual debut and baseline beliefs. Trial registration: Pan African Clinical Trials Registry PACTR201901837047199. Registered 31 December 2018. Retrospectively registered. This study adheres to CONSORT guidelines. en_US
dc.language.iso en en_US
dc.publisher BMC PUBLIC HEALTH en_US
dc.subject Impact evaluation,, HIV, Teen pregnancy, Health, School, Sex education, Southern Africa, Risk reduction en_US
dc.title Revealing a safer sex option to reduce HIV risk: a cluster-randomized trial in Botswana en_US
dc.type Article en_US

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