| IMRT ± SD | 3DCRT ± SD | P-value |
V25 (%) | 52.06 ± 10.38 | 56.28 ± 14.14 | 0.128 |
V40 (%) | 34.75 ± 6.36 | 38.38 ± 10.68 | 0.176 |
V60 (%) | 19.87 ± 3.84 | 24.42 ± 7.16 | 0.042 |
V70 (%) | 13 ± 2.12 | 16.98 ± 5.28 | 0.05 |