1) A phase 3 clinical trial evaluated the efficacy of ocrelizumab in reducing disability progression in patients with primary progressive multiple sclerosis (PPMS) with and without T1 gadolinium-enhancing lesions at baseline.
2) Results showed that ocrelizumab reduced the risk of 12-week and 24-week confirmed disability progression by 24% and 25% respectively compared to placebo in the overall study population.
3) When analyzing subgroups based on presence of T1 lesions at baseline, ocrelizumab reduced risk of disability progression in both subgroups, though the results did not reach statistical significance in the subgroup with lesions at baseline.