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Table 6 Comparison of PSA kinetics between SBRT and CF-EBRT by pre-treatment PSA (probability values)

From: Hypofractionated SBRT versus conventionally fractionated EBRT for prostate cancer: comparison of PSA slope and nadir

    Pretreatment PSA (ng/mL)  
   ≤10 >10 >4
  Through year    
Nadir PSA (ng/mL)     
  1 ns ns ns
  2 p = 0.001 ns p = 0.002
  3 p = 0.005 ns p = 0.001
Time to Nadir PSA (mos.)     
  1 ns ns ns
  2 ns ns ns
  3 p = 0.04 p = 0.03 p = 0.01
Rate of PSA change: ng/mL/Month    
  1 ns ns ns
  2 p = 0.05 ns (p = 0.08)
  3 (p = 0.06) ns p = 0.02
  1. For each of the 3 pretreatment PSA subsets the PSA outcomes were compared between SBRT and CF-EBRT. The distributions for PSA nadir and PSA slope were compared using the Mann–Whitney test. The distributions for the time to PSA nadir was compared using the log rank test.