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Table 3 Multivariate analysis of parameters with bRFS

From: Impact of pathological tumor stage for salvage radiotherapy after radical prostatectomy in patients with prostate-specific antigen < 1.0 ng/ml

Factors Hazards ratio (95% CI) p value
Pathologic tumor stage   0.003
T1-2 Reference  
T3-4 3.512 (1.535-8.037)  
Preoperative PSA (ng/ml)   0.177
< 10 Reference  
≥ 10 1.566 (0.816-3.006)  
PSADT (months)   0.272
< 7 Reference  
≥ 7 0.686 (0.350-1.344)  
RT dose (Gy)   0.357
< 64 Reference  
≥ 64 0.712 (0.345-1.469)  
  1. Abbreviations: bRFS = biochemical relapse-free survival, PSA = prostate-specific antigen, PSADT = prostate-specific antigen doubling time, RT = radiotherapy, RP = radical prostatectomy, CI = confidence interval