PFS2 data ‘important’
Invited discussant Karim Fizazi, MD, PhD, from the Institut Gustave Roussy in Villejuif, France, acknowledged it’s too early to draw conclusions about OS, but added that the PFS2 data are important.
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Dr. Karim Fizazi
The 45% reduction in risk of progression “is particularly important in this trial because abiraterone was provided as a potential salvage treatment in both arms. So in other words, in that trial they were almost truly comparing early AR [androgen receptor] targeting versus deferred AR targeting, at least in some patients, and it seems that [apalutamide] is making a difference in terms of second progression,” he said.
An unanswered question about the trial, however, is how active abiraterone was post apalutamide in the experimental, because there are data suggesting minimal efficacy in sequential therapy of AR-targeted agents, he added.
The SPARTAN trial was funded by Janssen. Dr. Smith disclosed an advisory role, research funding, and travel reimbursement for Janssen and others. Dr. Fizazi disclosed consulting for Janssen and others.
SOURCE: Smith MR et al. ESMO 2019, Abstract 843O