Figure 3

Time to virologic failure. ABC = abacavir; ddI = didanosine; EFV = efavirenz; HU = hydroxyurea. Virologic failure was defined by any of the following: HIV-1 RNA >400 copies/mL by week 24, repeated detection (>400 copies/mL) after initial suppression to undetectable levels (<400 copies/mL) or a 3-fold or greater increase in plasma HIV-1 RNA level from the nadir at week 8 or later.