Table 2 Univariate analysis of DVH parameters related to AAT
Training group (N = 248 cases) | Validation group (N = 99 cases) | |||||
|---|---|---|---|---|---|---|
Variables | NAAT (Mean ± SD) | AAT (Mean ± SD) | P | NAAT (Mean ± SD) | AAT (Mean ± SD) | P |
Prescribed Dose (Gy) | 67.04 ± 5.02 | 67.33 ± 5.77 | 0.672 | 69.12 ± 4.65 | 67.35 ± 3.96 | 0.073 |
Volume of anal canal (cm3) | 9.43 ± 4.02 | 10.02 ± 3.60 | 0.232 | 9.33 ± 3.51 | 8.00 ± 3.17 | 0.080 |
Anal canal Dmax (Gy) | 59.51 ± 12.95 | 63.22 ± 9.65 | 0.018 | 54.47 ± 13.83 | 58.40 ± 11.13 | 0.169 |
Anal canal Dmean (Gy) | 26.04 ± 12.60 | 30.25 ± 9.71 | 0.010 | 22.51 ± 9.61 | 29.43 ± 11.52 | 0.005 |
V10 (%) | 75.61 ± 22.45 | 84.48 ± 18.89 | 0.002 | 67.82 ± 22.35 | 85.52 ± 18.06 | 0.001 |
V20 (%) | 58.41 ± 26.62 | 72.62 ± 25.59 | < 0.001 | 49.71 ± 29.09 | 74.24 ± 23.84 | < 0.001 |
V30 (%) | 37.81 ± 24.32 | 52.08 ± 26.91 | < 0.001 | 30.65 ± 27.74 | 49.85 ± 30.98 | 0.006 |
V40 (%) | 19.31 ± 16.18 | 27.30 ± 20.44 | 0.001 | 13.75 ± 14.98 | 27.46 ± 25.60 | 0.009 |
V50 (%) | 8.81 ± 9.09 | 13.40 ± 13.01 | 0.002 | 5.22 ± 6.40 | 12.83 ± 15.38 | 0.011 |
V60 (%) | 3.16 ± 4.33 | 5.34 ± 7.28 | 0.006 | 1.66 ± 2.83 | 3.95 ± 5.59 | 0.038 |
V70 (%) | 0.08 ± 0.31 | 0.44 ± 2.13 | 0.099 | 0.07 ± 0.24 | 0.05 ± 0.27 | 0.785 |