Skip to main content

Table 5 Univariate analysis of average dosimetric parameters

From: Prognostic analysis of radiation pneumonitis: carbon-ion radiotherapy in patients with locally advanced lung cancer

Parameters ≥ grade 2
(min - max)
grade 0–1
(min - max)
p value
PTV (cm3) 448.5
(155.8–712.7)
371.0
(73.8–1319.8)
0.193
MLD (Gy RBE) 12.0
(6.5–17.0)
9.0
(2.9–16.2)
0.023
V5 (%) 33.8
(17.9–49.0)
24.9
(7.0–46.1)
0.034
V10 (%) 30.6
(15.3–46.2)
22.6
(6.5–42.6)
0.045
V20 (%) 24.5
(10.1–31.4)
17.9
(5.6–36.7)
0.039
V30 (%) 19.0
(10.1–31.4)
12.9
(3.7–23.6)
0.015
V40 (%) 12.2
(5.2–18.1)
8.8
(3.1–18.9)
0.052
V50 (%) 6.7
(2.6–13.3)
5.8
(2.1–14.2)
0.442
  1. PTV planning target volume, MLD mean lung dose, RBE relative biological effectiveness, V X volume of lung receiving ≥ X Gy (RBE)