Intergroup randomized phase III study of androgen deprivation therapy (ADT) plus radiation therapy (RT) in locally advanced prostate cancer (CaP) (NCIC-CTG, SWOG, MRC-UK, INT: T94-0110; NCT00002633)
2010
CRA4504 Background: The impact of radiotherapy on overall survival (OS) in men with locally advanced CaP is unclear. The SPCG-7 trial recently showed a benefit to RT for CaP specific mortality. Our primary objective was to assess the effect of RT on OS when added to lifelong ADT in men with locally advanced CaP. Methods: Patients with T3/T4 (1057) or T2, PSA > 40 μ g/l (119) or T2 PSA > 20 μ g/l and Gleason ≥ 8 (25) and N0 /NX, M0 prostate adenocarcinoma were randomized to lifelong ADT (bilateral orchiectomy or LHRH agonist) with or without RT (65-69 Gy to prostate ± seminal vesicles with or without 45Gy to pelvic nodes). The primary endpoint was OS and secondary endpoints included disease specific survival (DSS), time to disease progression and quality of life. Results: 1205 patients were randomized from 1995 to 2005, 602 to ADT and 603 to ADT+RT (well balanced with respect to baseline characteristics). A protocol specified second interim analysis on OS was performed in Aug 2009 (data cut-off Dec 31 2008...
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