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Table 2 Univariate analysis of dosimetric parameters associated with AE

From: Risk factors of radiation-induced acute esophagitis in non-small cell lung cancer patients treated with concomitant chemoradiotherapy

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
  1. 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.