| IMRT ± SD | 3DCRT ± SD | P-value |
V25 (%) | 55.12 ± 10.53 | 69.22 ± 16.65 | 0.05 |
V40 (%) | 36 ± 7.38 | 44.42 ± 12.87 | 0.05 |
V60 (%) | 18.22 ± 4.44 | 28.86 ± 9.46 | 0.012 |
V70 (%) | 8.75 ± 2.42 | 18.77 ± 9.31 | 0.025 |