Table 2.
Univariate analysis of dosimetric parameters associated with AE
| Variable |
Grade ≥ 2 AE |
Grade ≥ 3 AE |
||
|---|---|---|---|---|
| p | OR | p | OR | |
| Dmean (Gy) |
<0.001 |
1.002 |
<0.001 |
1.001 |
| Dmax (Gy) |
0.001 |
1.001 |
0.007 |
1.001 |
| V20 (%) |
0.001 |
1.068 |
0.01 |
1.054 |
| V30 (%) |
<0.001 |
1.149 |
0.001 |
1.069 |
| V40 (%) |
<0.001 |
1.159 |
<0.001 |
1.087 |
| V50 (%) |
<0.001 |
1.138 |
<0.001 |
1.097 |
| V60 (%) | <0.001 | 1.124 | <0.001 | 1.094 |
Abbreviations:AE = acute esophagitis; OR = odds ratio; Dmax the maximum dose of the esophagus; Dmean = the mean dose of the esophagus; V20,30,40,50,60 = relative esophageal volume for radiation dose ≥20,30,40,50,60 Gy, respectively.