Estimation of HIV incidence from analysis of HIV prevalence patterns among female sex workers in Zimbabwe.

Autor:	Ali MS; London School of Hygiene and Tropical Medicine, London, UK., Wit MDE; London School of Hygiene and Tropical Medicine, London, UK., Chabata ST; CeSHHAR, Harare, Zimbabwe., Magutshwa S; CeSHHAR, Harare, Zimbabwe., Musemburi S; CeSHHAR, Harare, Zimbabwe., Dirawo J; CeSHHAR, Harare, Zimbabwe., Rice B; London School of Hygiene and Tropical Medicine, London, UK., Platt L; London School of Hygiene and Tropical Medicine, London, UK., Bansi-Matharu L; University College London, London, UK., Harriet J; London School of Hygiene and Tropical Medicine, London, UK., Mharadze T; CeSHHAR, Harare, Zimbabwe., Chiyaka T; CeSHHAR, Harare, Zimbabwe., Mushati P; CeSHHAR, Harare, Zimbabwe., Mugurungi O; Ministry of Health and Child Care, Harare., Yekeye R; National AIDS Council of Zimbabwe, Harare, Zimbabwe., Mpofu A; National AIDS Council of Zimbabwe, Harare, Zimbabwe., Phillips AN; University College London, London, UK., Cowan FM; CeSHHAR, Harare, Zimbabwe.; Liverpool School of Tropical Medicine, Liverpool, UK., Hargreaves JR; London School of Hygiene and Tropical Medicine, London, UK.
Jazyk:	angličtina
Zdroj:	AIDS (London, England) [AIDS] 2022 Jul 01; Vol. 36 (8), pp. 1141-1150. Date of Electronic Publication: 2022 Feb 16.
DOI:	10.1097/QAD.0000000000003198
Abstrakt:	Objectives: To estimate HIV incidence among female sex workers (FSW) in Zimbabwe: using HIV prevalence by age and number of years since started selling sex (YSSS). Design: We pooled data from FSW aged 18-39 participating in respondent-driven sampling surveys conducted in Zimbabwe between 2011 and 2017. Methods: For each year of age, we estimated: HIV prevalence ( Pt ) and the change in HIV prevalence from the previous age ( Pt - Pt -1 ). We then estimated the rate of new HIV infections during that year of age: It  =  Pt - Pt -1 /(1 - Pt -1 ), and calculated HIV incidence for 18-24 and 25-39 year-olds separately as the weighted average of It . We estimated HIV incidence for FSW 1-5 years and 6-15 years since first selling sex using the same approach, and compared HIV prevalence among FSW first selling sex at their current age with the general population. Results: Among 9906 women, 50.2% were HIV positive. Based on HIV prevalence increases by age, we estimated an HIV incidence of 6.3/100 person-years at risk (pyar) (95% confidence interval [CI] 5.3, 7.6) among 18-24 year-olds, and 3.3/100 pyar (95% CI 1.3, 4.2) among 25-39 year-olds. Based on prevalence increases by YSSS, HIV incidence was 5.3/100 pyar (95% CI 4.3, 8.5) between 1 and 5 years since first selling sex, and 2.1/100 pyar (95% CI -1.3, 7.2) between 6 and 15 years. Conclusions: Our analysis is consistent with very high HIV incidence among FSW in Zimbabwe, especially among those who are young and recently started selling sex. There is a critical need to engage young entrants into sex work in interventions that reduce their HIV risk. (Copyright © 2022 Wolters Kluwer Health, Inc. All rights reserved.)
Databáze:	MEDLINE
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