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. Author manuscript; available in PMC: 2015 Jan 8.

Published in final edited form as: Lung Cancer. 2012 Jan 9;76(3):350–353. doi: 10.1016/j.lungcan.2011.11.025

Table 3.

Observed incidence of radiation pneumonitis in quartiles of patients defined based on dosimetric parameters

	MLD			V5			V30
Quartile	Mean Gy (range)	“unambiguous”	“hard to score”	Mean % (range)	“unambiguous”	“hard to score”	Mean % (range)	“unambiguous”	“hard to score”
1^st	16.6 (8.8–18.8)	2/24	6/24	23.9 (6.2–31.9)	1/24	4/24	14.2 (3.7–18.7)	1/24	5/24
2^nd	20 (18.9–21.2)	0/24	1/24	35.5 (31.9–38.1)	1/24	3/24	21 (18.9–23.4)	2/24	2/24
3^rd	22.3 (21.6–22.3)	3/24	1/24	41.2 (38.3–45)	4/24	1/24	24.8 (23.5–26.9)	1/24	1/24
4^th	25.6 (23.2–35.3)	3/25	0/25	51.9 (45.9–70.4)	2/25	0/25	30.4 (27–46.4)	4/25	0/25

Abbreviations: MLD= mean lung dose; V5 and V30= % lung volume receiving ≥5 and 30Gy, respectively.