SOUTH SAN FRANCISCO, Calif.--(BUSINESS WIRE)--Genentech, a member of the Roche Group (SIX: RO, ROG; OTCQX: RHHBY), announced today updated data from the pivotal CLL11 study confirming that Gazyva (obinutuzumab) plus chlorambucil reduced the risk of disease worsening or death by more than half compared to Rituxan® (rituximab) plus chlorambucil (progression-free survival, PFS; HR=0.46, median PFS 28.7 months versus 15.7 months; p<0.0001). New results to be presented at the American Society of Hematology (ASH) Annual Meeting from a secondary endpoint that measured time to next treatment (TTNT) showed that, after completing the set six-month Gazyva regimen, people remained treatment-free for nearly four years on average before needing the next treatment for their cancer (TTNT; 51.1 months, including the six-month initial treatment period). No unexpected safety signals were observed with Gazyva.