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Table 1 Clinical outcome definitions used in the STRIVE and TERRAIN trials

From: Number-needed-to-treat analysis of clinical progression in patients with metastatic castration-resistant prostate cancer in the STRIVE and TERRAIN trials

Outcomes

STRIVE

TERRAIN

PFS

Time from randomization to the earliest objective evidence of PSA progression, radiographic disease progression, or death, whichever occurred first

Time from randomization to the first progression event (i.e. the earliest incidence of centrally determined radiographic disease progression, a skeletal-related event, or initiation of a new antineoplastic therapy) or death, whichever occurred first

rPFS

Time from randomization to the first objective evidence of radiographic disease progression or death, whichever occurred first

Time from randomization to the first objective evidence of radiographic disease progression or death, whichever occurred first. Radiographic progression in bone at or after Week 13 required a confirmatory bone scan

Freedom from PSA progression

Time from randomization to the earliest evidence of PSA progression, as per PCWG2 guidelines. PSA progression was defined as a > 25% increase in PSA with an absolute increase of > 2 ng/mL above the nadir

Time from randomization to the earliest evidence of a confirmed PSA progression, as per PCWG2 guidelines. PSA progression needs to be confirmed by a second consecutive value obtained ≥3 weeks later

  1. PCWG2 Prostate Cancer Working Group 2, PFS progression-free survival, PSA prostate-specific antigen, rPFS radiographic progression-free survival