At week 24 , HIV-1 RNA < 50 copies/mL was achieved by fewer patients receiving lersivirine 750 mg ( 48.4 % ) and 1,000 mg ( 43.8 % ) qd compared with etravirine 200 mg qd ( 67.7 % ) ( intention to treat [ ITT ] , missing/switch/discontinuation equals failure [ MSDF ] ) .