Table 2.
Summary of treatment parameters in the three centers
| n | Mean (SD) | Median | Min | Max | ||
|---|---|---|---|---|---|---|
| Volume (mm3) | Center A | 176 | 29.0 (14.3) | 25.0 | 5.0 | 103.3 |
| Center B | 80 | 27.7 (12.3) | 30.0 | 10.0 | 70.0 | |
| Center C | 40 | 23.8 (12.8) | 20.0 | 10.0 | 60.5 | |
| Overall | 296 | 28.0 (13.7) | 25.0 | 5.0 | 103.3 | |
| Prescription dose (Gy) | Center A | 176 | 57.7 (6.7) | 60.0 | 35.0 | 90.0 |
| Center B | 80 | 57.4 (2.6) | 58.0 | 38.0 | 60.0 | |
| Center C | 40 | 60.2 (4.1) | 60.0 | 49.0 | 70.0 | |
| Overall | 296 | 58.0 (5.6) | 60.0 | 35.0 | 90.0 | |
| Isodose (%) | Center A | 176 | 83.0 (3.2) | 83.0 | 73.0 | 90.0 |
| Center B | 80 | 80.0 (0.4) | 80.0 | 78.0 | 80.0 | |
| Center C | 40 | 80.0 (3.2) | 80.0 | 70.0 | 85.0 | |
| Overall | 296 | 81.6 (3.1) | 80.0 | 70.0 | 90.0 | |
| Dmax (Gy) | Center A | 176 | 70.0 (8.1) | 71.3 | 42.7 | 112.5 |
| Center B | 80 | 72.0 (3.3) | 72.5 | 47.5 | 75.0 | |
| Center C | 40 | 75.7 (4.0) | 75.0 | 70.0 | 87.5 | |
| Overall | 296 | 71.1 (7.0) | 72.4 | 42.7 | 112.5 | |
| Dmean (Gy) | Center A | 176 | 63.7 (7.3) | 65.3 | 38.8 | 101.3 |
| Center B | 80 | 64.7 (2.9) | 65.3 | 42.8 | 67.5 | |
| Center C | 40 | 68.1 (3.8) | 67.5 | 59.8 | 80.1 | |
| Overall | 296 | 64.5 (6.2) | 65.3 | 38.8 | 101.3 | |
| Integral dose (mJ) | Center A | 176 | 2.0 (0.9) | 1.6 | 0.3 | 6.7 |
| Center B | 80 | 1.8 (0.8) | 1.9 | 0.6 | 4.4 | |
| Center C | 40 | 1.6 (0.8) | 1.4 | 0.7 | 4.0 | |
| Overall | 296 | 1.8 (0.9) | 1.6 | 0.3 | 6.7 | |