Table 5.
The volume reduction and the center of mass displacements of target volumes in male and female patients (mean ± standard deviation)
| Target volume | Gender | Volume reduction (%) | Displacement (mm)
|
|||
|---|---|---|---|---|---|---|
| LR | CC | AP | 3D | |||
| GTV_T | Male | 36.3±21.1 (31.9, 40.7) | 0.8±2.5 (0.3, 1.3) | 0.0±1.2 (−0.3, 0.2) | −1.4±1.7 (−1.7, −1.0) | 3.1±1.8 (2.1, 4.1) |
| Female | 42.2±18.4 (35.3, 49.1) | 1.8±4.6 (0.1, 3.5) | −0.3±0.7 (−0.5, 0.0) | −1.0±1.0 (−1.4, −0.7) | 4.5±2.7 (1.1, 7.9) | |
| CTV_T | Male | 25.6±16.0 (22.3, 29.0) | 0.8±2.4 (0.3, 1.3) | 0.0±1.1 (−0.3, 0.2) | −1.5±1.5 (−1.8, −1.2) | 3.0±1.8 (2.0, 4.0) |
| Female | 28.7±17.9 (22.0, 35.4) | 1.6±4.6 (−0.1, 3.4) | 0.1±0.9 (−0.2, 0.4) | −0.9±1.1 (−1.3, −0.5) | 4.5±2.7 (1.1, 7.9) | |
| GTV_Nl | Male | 54.8±26.7 (46.4, 63.1)* | −0.6±2.3 (−1.3, 0.1) | 0.0±4.3 (−1.3, 1.3) | −1.0±2.5 (−1.7, −0.2) | 5.1±3.1 (1.9, 8.3) |
| Female | 34.8±18.9 (14.9, 54.7) | 0.2±0.7 (−0.6, 0.9) | 0.0±0.6 (−0.6, 0.6) | 0.1±0.8 (−0.7, 1.0) | 2.0±1.3 (0.3, 3.4) | |
| CTV_Nl | Male | 40.2±21.2 (33.6, 46.8)* | −0.2±2.2 (−0.8, 0.5) | −0.1±2.0 (−0.7, 0.6) | 1.3±1.2 (0.0, 2.5) | 2.7±1.5 (1.1, 4.3) |
| Female | 20.6±22.3 (2.9, 44.0) | −0.4±0.7 (−1.2, 0.4) | −0.4±1.2 (−0.8, 0.0) | 0.2±0.5 (−0.3, 0.7) | 2.9±1.4 (0.9, 5.7) | |
| GTV_Ns | Male | 54.2±22.4 (49.9, 58.5)* | 0.1±2.4 (−0.4, 0.6) | −0.5±2.6 (−1.0, 0.0) | −0.6±2.1 (−1.0, −0.2) | 3.8±1.9 (2.8, 4.7) |
| Female | 39.9±34.0 (28.3, 51.4) | 0.5±2.3 (−0.3, 1.2) | −0.4±1.7 (−1.1, 0.2) | 1.3±2.2 (0.5, 2.1)* | 3.5±1.3 (2.2, 4.9) | |
| CTV_Ns | Male | 39.5±19.4 (35.8, 43.2) | 0.2±2.3 (−0.3, 0.6) | −0.7±2.8 (−1.3, −0.2) | −0.2±2.1 (−0.6, 0.2) | 3.8±1.9 (2.9, 4.8) |
| Female | 28.6±15.1 (23.4, 33.7)* | 0.1±1.9 (−0.6, 0.7) | −0.7±1.3 (−1.1, −0.2) | 1.4±2.0 (0.7, 2.1)* | 3.1±1.5 (1.5, 4.7) | |
| CTV_Lr | Male | 5.2±4.8 (3.3, 5.3) | −0.1±1.6 (−0.4, 0.2) | 1.9±1.9 (1.5, 2.3) | 0.5±0.6 (0.3, 0.6) | 2.8±1.6 (1.9, 3.7) |
| Female | 4.3±2.6 (4.3, 6.2) | −0.4±0.6 (−0.6, −0.2) | 1.1±1.0 (0.7, 1.4)* | 0.8±0.4 (0.6, 0.9)* | 1.7±0.6 (1.0, 2.5) | |
Note:
P-value<0.05, and the 95% confidence interval is shown in parentheses. A negative number means a shift to the right, caudal, and posterior in the LL, CC, and AP directions, respectively.
Abbreviations: LR, left–right; CC, cranial–caudal; AP, anterior–posterior; 3D, three-dimensional vector displacements; GTV_T, gross tumor volume of the primary tumor; CTV_T, clinical target volume of the primary tumor; GTV_Nl, gross tumor volume of the large lymph nodes (minimum diameter >3.0 cm); CTV_Nl, clinical target volume of the large lymph nodes; GTV_Ns, gross tumor volume of the small lymph nodes (minimum diameter >1.0 cm and ≤3.0 cm); CTV_Ns, clinical target volume of the small lymph nodes; CTV_Lr, clinical target volume of the elective region.