Table 4.
Dosimetric parameters for patients with and without local relapse (n = 200)
| Parameters | Patients without local relapse (n = 181) | Patients with local relapse (n = 19) | P‐value | ||
|---|---|---|---|---|---|
| Median | Range | Median | Range | ||
| PGTVnx | |||||
| Volume (cc) | 90.6 | 11.7‐257.4 | 76.7 | 25.7‐208.3 | .40 |
| D2 (Gy) | 79.9 | 73.2‐85.7 | 81.3 | 75.2‐85.7 | .22 |
| D50 (Gy) | 74.9 | 67.8‐79.6 | 76.8 | 71.3‐78.9 | .34 |
| D95 (Gy) | 70.0 | 61.6‐75.8 | 70.0 | 59.3‐73.4 | .81 |
| D98 (Gy) | 68.4 | 58.3‐74.8 | 69.0 | 54.7‐71.8 | .78 |
| PCTV1 | |||||
| Volume (cc) | 189.5 | 50.1‐850.8 | 158.8 | 80.34‐892.2 | .32 |
| D2 (Gy) | 79.0 | 64.4‐84.6 | 79.7 | 66.0‐85.3 | .27 |
| D50 (Gy) | 71.8 | 57.1‐78.6 | 72.6 | 64.2‐77.6 | .56 |
| D95 (Gy) | 63.0 | 54.2‐74.6 | 63.4 | 55.1‐68.2 | .72 |
| D98 (Gy) | 60.6 | 51.3‐73.4 | 61.1 | 52.1‐70.0 | .57 |
| PCTV2 | |||||
| Volume (cc) | 702.2 | 430.9‐1268.2 | 636.4 | 465.4‐1430.0 | .43 |
| D2 (Gy) | 76.1 | 56.3‐82.4 | 76.6 | 58.1‐83.7 | .48 |
| D50 (Gy) | 62.7 | 53.0‐72.9 | 63.4 | 55.6‐70.6 | .62 |
| D95 (Gy) | 55.3 | 45.4‐68.5 | 55.0 | 50.0‐57.4 | .42 |
| D98 (Gy) | 53.2 | 43.1‐68.0 | 52.8 | 46.7‐55.5 | .37 |
Abbreviations: D2‐98, minimum dose to 2–98% volume; Volume, Volume of PGTVnx, PCTV1, PCTV2.