|  |  | SBRT | CF-EBRT | p-value |
---|---|---|---|---|---|
 |  | Through year |  |  |  |
PSA Measurements # | Â | Â | Â | Â | |
 | Mean (range) | 1 | 3.9 (2 – 6) | 4.1 (3 – 11) |  |
 |  | 2 | 5.8 (4 – 9) | 5.6 (3 – 15) |  |
 |  | 3 | 7.6 (5 – 11) | 7.3 (3 – 21) |  |
Nadir PSA (ng/mL) | Â | Â | Â | Â | |
 | Median (range) | 1 | 0.70 (0 – 2.5) | 1.00 (0 – 8.5) |  |
 |  | 2 | 0.40 (0 – 1.4) | 0.72 (0 – 2.7) | p = 0.0005* |
 |  | 3 | 0.24 (0.1 – 1.4) | 0.60 (0 – 2.2) | p = 0.002* |
Time to Nadir PSA (mos.) | Â | Â | Â | Â | |
 | Median (range) | 1 | 12.0 (2.7 – 15.0) | 11.5 (1.2 – 15.0) |  |
 |  | 2 | 21.0 (2.7 – 26.9) | 18.0 (1.2 – 26.9) |  |
 |  | 3 | 32.3 (2.7 – 41.6) | 28.6 (1.0 – 41.1) | p = 0.004^ |
Rate of PSA change: ng/mL/month | Â | Â | Â | ||
 | Median slope (range) | 1 | -0.09 (-0.88, 0.04) | -0.09 (-0.60, 0.06) |  |
 |  | 2 | -0.06 (-0.38, 0.01) | -0.04 (-0.65, 0.05) | p = 0.04* |
 |  | 3 | -0.05 (-0.19, 0.00) | -0.02 (-0.38, 0.04) | p = 0.006* |