Table 6. Comparison of radiation dose to OARs between the C-IMRT and SIR-IMRT groups.
| Variables | C-IMRT group (n=137) | SIR-IMRT group (n=120) | P value |
|---|---|---|---|
| Mean lung dose (Gy) | 11.17±3.08 | 11.30±5.51 | 0.269 |
| Lung V5 (%) | 43.72±12.41 | 46.63±10.97 | 0.074 |
| Lung V20 (%) | 21.94±6.69 | 21.61±6.43 | 0.342 |
| Lung V30 (%) | 13.17±4.94 | 11.99±4.61 | 0.013 |
| Mean heart dose (Gy) | 18.55±24.42 | 19.80±12.48 | 0.122 |
| Heart V30 (%) | 23.89±19.57 | 26.32±18.00 | 0.290 |
| Heart V40 (%) | 14.44±12.48 | 15.56±12.26 | 0.444 |
| Maximum spinal cord dose (Gy) | 43.26±5.74 | 43.11±4.75 | 0.047 |
SIR-IMRT, simultaneous integrated dose reduction in clinical target volume with intensity-modulated radiotherapy; C-IMRT, conventional-IMRT; V5 Volumes receiving more than 5 Gy; V20 Volumes receiving more than 20 Gy; V30 Volumes receiving more than 30 Gy V40 Volumes receiving more than 40 Gy.