The contribution of receptive anal sex to HIV transmission : Women at risk in the US

Study objectives

The study aimed to estimate the prevalence and frequency of receptive anal intercourse (RAI) among low-income heterosexual women in 20 high-AIDS incidence cities to inform and to develop a mathematical model to estimate the fraction of HIV incidence  due to RAI among that population of vulnerable women.



Modelling objectives

We aimed to use data on low-income heterosexual women from National HIV Behavioral Surveillance (2010/2013) living in 20 high-AIDS cities to estimate RAI prevalence and frequency.

We developed and calibrated a risk-equation model using the NHBS and additional data to estimate the fraction of annual incidence HIV infection due to RAI among highly vulnerable women, taking into account uncertainty in parameter assumptions.



Project collaborators: Peter Anton, Barbara Shacklett, Ian McGowan

CDC: The NHBS study group, Gabriela Paz-Bailey, Kristen Hess, Sevgi Aral

HPTN women at risk working group: Ada Adimora, Sevgi Aral

Additional Funding

This work was funded by the NIH (grant NIH/NIAID R01 AI057020).

The HPTN Modelling Centre, which is funded by the U.S. National Institutes of Health (NIH UM1AI068617) through HPTN, also partially funded this work.