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

ABSTRACT:

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 prev

SUBMITTER: Ali MS 

PROVIDER: S-EPMC7618220 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature