Table 4.
Percentage of patients with organs at risk constraints out of tolerance according to our protocols (dose-volume histogram = DVH).
| Organs at Risk | DVH Metric | S1 * % |
S2 * % |
S3 * % |
p ** |
|---|---|---|---|---|---|
| Spinal cord | D2% | 00.00 | 00.00 | 06.25 | 0.060 |
| Parotids, either left or right |
Dmean | 42.11 | 44.64 | 53.06 | 0.260 |
| V45Gy | 31.58 | 35.09 | 87.76 | 0.000 | |
| V30Gy | 21.05 | 15.79 | 69.39 | 0.001 | |
| V15Gy | 24.56 | 21.05 | 55.10 | 0.001 | |
| Larynx | V40Gy | 12.96 | 25.45 | 80.56 | 0.000 |
| Dmean | 43.75 | 46.94 | 69.44 | 0.019 | |
| Oral cavity | V40Gy | 46.43 | 51.79 | 77.55 | 0.001 |
* S1, OPLAN; S2, APLAN; S3, DPLAN. ** Statistical significance was evaluated against scenario 1 (OPLAN) using the Chi-squared test. No statistically significant differences occurred between scenario 1 and 2 (APLAN).