"Overall efficacy results demonstrate that alemtuzumab provides a significant treatment effect that has been found to last three years among patients in the study. Analysis of the first co-primary endpoint showed that patients taking alemtuzumab experienced at least a 73 percent reduction in the risk for relapse after three years of follow up when compared to patients treated with interferon beta-1a. This difference was highly statistically significant in favor of the alemtuzumab patients with a p-value less than the pre-specified value (p=0.00396) assigned for the three-year analysis.
Analysis of the other co-primary endpoint showed that patients taking alemtuzumab experienced at least a 70 percent reduction in the risk for progression of clinically significant disability when compared to patients treated with interferon beta-1a. This difference was statistically significant in favor of the alemtuzumab patients with a p-value less than the pre-specified value (p=0.01646) assigned for the three-year analysis."