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Introduction: Age‐disparate sex has long been considered a factor that increases HIV risk for young women in South Africa. However, recent studies from specific regions in South Africa have found conflicting evidence. Few studies have assessed the association between age‐disparate partnerships (those involving an age gap of 5 years or more) and HIV risk at the national level. This study investigates the relationship between age‐disparate sex and HIV status among young women aged 15–24 in South Africa.

Methods: Nationally representative weighted data from the 2002, 2005, 2008, and 2012 South African National HIV Surveys were analysed for young women aged 15–24 years using bivariate analyses and multiple logistic regressions.

Results: After conducting multiple logistic regression analyses and controlling for confounders, young women with age‐disparate partners had greater odds of being HIV …