Table 1: Patient characteristics.

Characteristics (%) Age, years  Range 53 – 81  Median 66 PSA before RP  Range 3.3–58.0  Median 8.1  ≥5 46 81%  <5 11 19% PSA after RP  Range 0.1–1.8  Median 0.4  ≥0.2 51 89%  <0.2 6 11% Pathological stage  pT2a 5 9%  pT2b 8 14%  pT2c 25 44%  pT3a 14 25%  pT3b 5 9%  pT4 0 0% Surgical margins  Positive 29 51%  Negative 28 49% Gleason score  ≤6 23 40%  7 32 56%  ≥8 2 4% Type of IMRT  5 coplanar fields 45 79%  VMAT (RapidArc) 12 21% Androgen deprivation  Yes 44 77%  Short course (<9 months) 37 65%  Long course 7 12%  No 13 23%

VMAT: volumetric intensity-modulated arc therapy.