Table 4.

Multivariate analysis of ARP (grade 1–4) and SARP (grade 3–4)

	Variable	B	S.E.	Wald	P-value	Exp (B)	95%CI lower	Upper
ARP	Pulmonary infection in RT	2.265	1.154	3.850	0.017	9.632	1.002	92.549
	MLD (≥12 Gy)	2.160	0.596	13.145	0.000	8.672	2.698	27.877
SARP	V30 (≥13%)	2.936	1.139	6.646	0.010	18.846	2.022	175.689

ARP, acute radiation pneumonitis; MLD, mean lung dose; SARP, severe acute radiation pneumonitis; V30, percentage of lung receiving ≥ 30 Gy.