KANSAS CITY, Mo.--(BUSINESS WIRE)--A retrospective study comparing outcomes of relapsing-remitting multiple sclerosis (RRMS) patients treated either with COPAXONE® (glatiramer acetate injection) or high-dose interferon beta-1a (Rebif®)demonstrated that patients continuously treated with COPAXONE® had a significantly lower risk of relapse (p=0.0049) and experienced significantly lower two-year total medical costs (p<0.0001) than those continuously treated with interferon beta-1a (Rebif®).