AstraZeneca presented results from the interim analysis of the Phase III Elevate TN trial, showing that Calquence combined with obinutuzumab or as monotherapy significantly improved progression-free survival compared to chlorambucil plus obinutuzumab, a standard chemo-immunotherapy treatment, in patients with previously untreated chronic lymphocytic leukemia. At a median follow-up of 28.3 months, Calquence in combination with obinutuzumab or as a monotherapy "significantly reduced" the risk of disease progression or death by 90% and 80%, respectively, versus chlorambucil plus obinutuzumab, AstraZeneca said in a statement. In an exploratory analysis, Calquence in combination or alone demonstrated consistent PFS improvements across most pre-specified subgroups of patients with high-risk disease characteristics, including the unmutated immunoglobulin heavy-chain variable gene, del(11q) and complex karyotype, it added. Overall, the safety and tolerability profile of Calquence observed in the trial was consistent with its known profile, according to AstraZeneca.