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In a substudy of a randomized trial, researchers assessed the neurological and neuropsychological effects of combination antiretroviral therapy (ART) in three African, two Asian, and two South American countries. In all, 860 treatment-naive HIV-infected participants (median age, 34; 53% women; median CD4 count, 172 cells/mm3; median viral load, 5.0 log copies/mL) had been randomized to one of three regimens:
AZT/3TC + efavirenz
FTC + ddI + atazanavir
tenofovir/FTC + efavirenz
In the parent study, FTC + ddI + atazanavir was discontinued because of inferior virologic outcomes compared with AZT/3TC + efavirenz; participants receiving FTC + ddI + atazanavir were allowed to switch regimens. Overall, the patients spent a median of 168 weeks in the st…