Table 1 Incidence of TLN in subgroups defined by ROC curve analysis of rVX, aVX, Dmax and Dmean
Variable | Range (median) | Group | No. of TLs | Incidence of TLN | χ 2 | P value |
|---|---|---|---|---|---|---|
rV10 | 6.8%–100%(37.86%) | ≤42% | 316 | 1.9% | 53.360 | 0.000 |
>42% | 185 | 22.2% | ||||
aV10 | 7.32–107.86 cc(29.00 cc) | ≤38 cc | 358 | 2.8% | ||
>38 cc | 143 | 25.9% | 64.033 | 0.000 | ||
rV20 | 4.16%–100%(21.12%) | ≤21% | 272 | 0.7% | 52.326 | 0.000 |
>21% | 229 | 19.7% | ||||
aV20 | 2.93–107.86 cc(16.02 cc) | ≤17 cc | 294 | 0.7% | 63.368 | 0.000 |
>17 cc | 207 | 21.7% | ||||
rV30 | 1.80%–99.99%(12.67%) | ≤20% | 364 | 2.7% | ||
>20% | 137 | 27% | 68.911 | 0.000 | ||
aV30 | 1.10–107.85 cc(9.39 cc) | ≤15 cc | 358 | 2.2% | ||
>15 cc | 143 | 27.3% | 75.354 | 0.000 | ||
rV40 | 0.06%–99.52%(6.59%) | ≤11% | 363 | 2.5% | ||
>11% | 138 | 27.5% | 73.846 | 0.000 | ||
aV40 | 0.04–107.34 cc(4.92 cc) | ≤11 cc | 409 | 2.7% | ||
>11 cc | 92 | 39.1% | 117.321 | 0.000 | ||
rV50 | 0.00%–98.07%(2.49%) | ≤5% | 363 | 1.7% | ||
>5% | 138 | 29.7% | 92.589 | 0.000 | ||
aV50 | 0.00–105.78 cc(1.92 cc) | ≤4 cc | 364 | 1.6% | ||
>4 cc | 137 | 29.9% | 93.632 | 0.000 | ||
rV60 | 0.00%–92.58%(0.25%) | ≤2% | 422 | 4.0% | ||
>2% | 79 | 38.0% | 90.200 | 0.000 | ||
aV60 | 0.00–99.86 cc(0.20 cc) | ≤2 cc | 430 | 4.0% | ||
>2 cc | 71 | 42.3% | 105.150 | 0.000 | ||
rV66 | 0.00%–77.40%(0.00%) | ≤0.1% | 340 | 0.9% | ||
>0.1% | 161 | 27.3% | 89.895 | 0.000 | ||
aV66 | 0.00–83.48 cc(0.00 cc) | ≤0.2 cc | 361 | 1.1% | ||
>0.2 cc | 139 | 30.2% | 101.788 | 0.000 | ||
rV70 | 0.00%–50.65%(0.00%) | ≤0.01% | 351 | 1.7% | ||
>0.01% | 150 | 27.3% | 81.166 | 0.000 | ||
aV70 | 0.00–54.64 cc(0.00 cc) | ≤0.07 cc | 380 | 2.4% | ||
>0.07 cc | 121 | 31.4% | 91.021 | 0.000 | ||
Dmax | 32.4–84.9 Gy(66.15 Gy) | ≤68.85 Gy | 321 | 0.6% | 80.616 | 0.000 |
>68.85 Gy | 180 | 25.0% | ||||
Dmean | 3.9–35.7 Gy(11.70 Gy) | ≤11.55 Gy | 273 | 0.4% | 57.347 | 0.000 |
>11.55 Gy | 228 | 20.2% |