Energy | 6 MV | 6 FFF | 15 MV | 6 MeV | 9 MeV | 12 MeV |
N | 29 | 21 | 26 | 24 | 24 | 26 |
| 1.76 × 10−5 | 1.91 × 10−5 | 1.83 × 10−5 | 2.69 × 10−5 | 2.44 × 10−5 | 2.93 × 10−5 |
| 0.0042 | 0.0044 | 0.0043 | 0.0052 | 0.0049 | 0.0054 |
| 1.12 × 10−4 | 1.73 × 10−4 | 7.82 × 10−4 | 2.14 × 10−4 | 2.67 × 10−4 | 1.40 × 10−4 |
| 0.0106 | 0.0132 | 0.0088 | 0.0146 | 0.0163 | 0.0119 |
p-value | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 |