Table 1.
Comparisons of the absolute and percentage reductions in weekly CTV and GTV
| Target volume | Comparison | Absolute reduction (mean + SD, mL) | Percentage reduction (mean, %) | t | P |
|---|---|---|---|---|---|
| CTV |
CTV0* vs CTV1 |
10.95 ± 1.35 |
1.8 |
8.07 |
<0.0001 |
| |
CTV1 vs CTV2 |
10.91 ± 2.18 |
1.8 |
2.18 |
<0.0001 |
| |
CTV2 vs CTV3 |
12.27 ± 3.17 |
2.9 |
5.44 |
<0.0001 |
| |
CTV3 vs CTV4 |
23.63 ± 4.03 |
3.7 |
5.86 |
<0.0001 |
| |
CTV4 vs CTV5 |
13.69 ± 2.12 |
2.2 |
6.46 |
<0.0001 |
| GTV |
GTV0* vs GTV1 |
8.80 ± 1.25 |
10.3 |
7.05 |
<0.0001 |
| |
GTV1 vs GTV2 |
5.98 ± 1.74 |
6.8 |
3.44 |
0.0027 |
| |
GTV2 vs GTV3 |
8.79 ± 2.14 |
9.9 |
4.10 |
0.0006 |
| |
GTV3 vs GTV4 |
8.01 ± 2.75 |
10.5 |
2.91 |
0.009 |
| GTV4 vs GTV5 | 6.20 ± 0.93 | 9.1 | 6.63 | <0.0001 |
*The pretreatment volumes were labeled week 0.