Apparently, this is a disease setting where PD-L1 expression doesn’t matter as much as it usually does. In the excerpt you posted, the HR for RFS* was 0.67 for the entire trial and 0.64 (a little better) for the PD-L1-positive subgroup.
*a/k/a DFS; equivalent to PFS in settings where all patients begin the trial with no observed disease.
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