At week 48 , HIV-1 RNA < 50 copies/mL and < 400 copies/mL were also achieved by fewer patients receiving lersivirine 750 mg ( 41.9 % and 41.9 % , respectively ) and 1,000 mg ( 31.3 % and 34.4 % , respectively ) qd compared with etravirine 200 mg bid ( 61.8 % and 70.6 % , respectively ) ( ITT , MSDF ) .