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Pretreatment HIV drug resistance (PDR) by age, gender, and antiretroviral (ARV) experience. Bar charts illustrate the prevalence of PDR and 95% confidence intervals by 5 age categories (<18, 18–24, 25–35, 35–50, and 50 years and older). Data are shown for all 987 study participants (A), 849 ARV-naive participants (B), and 138 ARV-experienced participants (C). In each panel, data are shown stratified by gender.
