Table 2. The univariate analysis of radiation-induced lung injury (RILI) and physical parameters (X±SD) in 109 breast cancer patients.
| Dosmetry factors | Lung injury group (n=99) | No injury group (n=10) | P value |
|---|---|---|---|
| V5 (%) | 67.0±15.1 | 80.6±10.4 | 0.007 |
| V10 (%) | 46.51±11.7 | 61.1±14.5 | 0.000 |
| V15 (%) | 33.6±5.8 | 41.9±8.4 | 0.000 |
| V20 (%) | 25. 9±2.5 | 29.6±1.6 | 0.000 |
| V25 (%) | 21.4±2.3 | 23.5±2.1 | 0.007 |
| V30 (%) | 17.9±2.3 | 18.9±2.6 | 0.227 |
| V35 (%) | 14.6±2. 6 | 14.5±3.0 | 0.954 |
| V40 (%) | 11.0±2.9 | 10.2±3.4 | 0.355 |
| V45 (%) | 7.0±2.9 | 5.7±3.4 | 0.181 |
| PTV(V/cm3) | 882.6±335.1 | 931.8±282.6 | 0.655 |
| Ipsilateral lung volume(V/cm3) | 1230.4±294.3 | 1339.9±385.8 | 0.279 |
| Bilateral lung volume(V/cm3) | 2444.3±592.0 | 2798.7±702.3 | 0.079 |
| The maximum dose of the lungs (D/Gy) | 55.7±3.0 | 55.7±2.5 | 0.949 |
| The average dose of bilateral lung (D/Gy) | 8. 6±1.5 | 9.4±1.1 | 0.101 |
| The maximum dose of contralateral lung (D/Gy) | 16.8±14.9 | 18.5±13.6 | 0.726 |
| The average dose of contralateral lung (D/Gy) | 1.8±2.2 | 1.8±0.9 | 0.922 |
| The maximum dose of ipsilateral lung (D/Gy) | 55.6±2.9 | 55.5±2.3 | 0.928 |
| The average dose of ipsilateral lung (D/Gy) | 14.8±1.6 | 17.0±1.1 | 0.000 |