Rescue criteria were: 1) central reader MRI finding of 1 new gadolinium-enhancing (Gd+) lesion of >0.8 cubic centimeters in volume or 2 or more Gd+ lesions of any size 2) clinical relapse. Clinical relapse was new or recurrent neurological symptoms not associated with fever or infection, lasting at least 24 hours, as defined by: an increase of ≥1 grade in ≥2 functional scales of the Expanded Disability Status Scale (EDSS); an increase of ≥2 grades in 1 functional scale of the EDSS; or an increase of >0.5 in EDSS if the previous EDSS was ≤5.5, or ≥0.5 if the previous EDSS was >5.5

Of the randomized subjects, data from 167 subjects were used in efficacy analyses. Eight subjects were excluded from the analyses: 3 subjects had major protocol deviations and 5 subjects discontinued study participation prior to Week 4 Visit.

MRI rescue criteria were the presence of 1 new gadolinium-enhancing (Gd+) lesion of >0.8 cubic centimeters in volume or 2 or more Gd+ lesions of any size, according to the central MRI reader.

Of the randomized subjects, data from 167 subjects were used in efficacy analyses. Eight subjects were excluded from the analyses: 3 subjects had major protocol deviations and 5 subjects discontinued study participation prior to Week 4 Visit.