| R2 | Direction of interfractional motion of the prostate | Regression coefficient | SD | P value |
Rectum V10 | 0.38 | (constant) | −0.24 | 0.16 | 0.12 |
AP axis (mm) | −0.63 | 0.07 | <0.01 | ||
SI axis (mm) | −0.35 | 0.08 | 0.01 | ||
LR axis (mm) | 0.09 | 0.18 | 0.61 | ||
Rectum V20 | 0.73 | (constant) | −0.69 | 0.29 | 0.02 |
AP axis (mm) | −1.70 | 0.12 | <0.01 | ||
SI axis (mm) | 0.16 | 0.16 | 0.31 | ||
LR axis (mm) | 0.50 | 0.33 | 0.13 | ||
Rectum V30 | 0.87 | (constant) | −0.45 | 0.27 | 0.10 |
AP axis (mm) | −2.23 | 0.11 | <0.01 | ||
SI axis (mm) | 0.61 | 0.15 | <0.01 | ||
LR axis (mm) | 0.41 | 0.31 | 0.19 | ||
Rectum V40 | 0.92 | (constant) | −0.14 | 0.24 | 0.54 |
AP axis (mm) | −2.38 | 0.10 | <0.01 | ||
SI axis (mm) | 0.82 | 0.13 | <0.01 | ||
LR axis (mm) | 0.41 | 0.27 | 0.13 | ||
Rectum V50 | 0.93 | (constant) | 0.11 | 0.21 | 0.61 |
AP axis (mm) | −2.33 | 0.09 | <0.01 | ||
SI axis (mm) | 0.92 | 0.11 | <0.01 | ||
LR axis (mm) | 0.27 | 0.24 | 0.27 | ||
Rectum V60 | 0.94 | (constant) | 0.41 | 0.19 | 0.03 |
AP axis (mm) | −2.15 | 0.08 | <0.01 | ||
SI axis (mm) | 1.00 | 0.10 | <0.01 | ||
LR axis (mm) | 0.12 | 0.22 | 0.58 | ||
Rectum V70 | 0.93 | (constant) | 0.84 | 0.18 | <0.01 |
AP axis (mm) | −1.83 | 0.08 | <0.01 | ||
SI axis (mm) | 1.01 | 0.10 | <0.01 | ||
LR axis (mm) | −0.17 | 0.21 | 0.42 |