Abstract
This study assesses whether men's ART use mitigates HIV-risk within age-disparate partnerships. Using data from the 2012 South African National HIV survey, we analyzed differences in HIV prevalence and ART use between men in age-disparate and age-similar partnerships with young women aged 15-29 using multiple logistic regression analyses. Within partnerships involving women 15-24years old, men in age-disparate partnerships were more likely to be HIV-positive (5-9year age-gap: aOR 2.8, 95%CI 1.4-5.2; p<0.01; 10+ year age-gap: aOR 2.2, 95%CI 1.0-4.6; p<0.05). Men in age-disparate partnerships who were 5-9years older were significantly more likely to be HIV-positive and ART-naïve (aOR 2.4, 95%CI 1.2-4.8; p<0.05), while this was not the case for men 10+ years older (aOR 1.5, 95%CI 0.7-3.6; p=0.32). No evidence was found that 25-29year old women were at greater HIV-risk in age-disparate partnerships. Our results indicate that young women aged 15-24 have a greater likelihood of exposure to HIV through age-disparate partnerships, but ART use among men 10+ years older could mitigate risk.
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