A Study of the Efficacy and Safety of Tocilizumab in Participants With Systemic Sclerosis (SSc)

This study will assess the efficacy and safety of tocilizumab compared with placebo in participants with SSc across approximately 120 planned global study sites. The study will consist of a 48-week, double-blind, placebo-controlled period followed by a 48-week open-label treatment period. Participants will be assigned, in a 1:1 ratio, to double-blind treatment with active tocilizumab or matching placebo. In the open-label period, eligible participants from either arm may receive active tocilizumab.