Table 3.

Radiation Pneumonitis According To Underlying Pulmonary Diseases (N=234)

Characteristics	Control*	COPD	CPFE	IPF	P value
All patients (N=234)	64	132	16	22
≥ Grade 3 RP	1 (1.6%)	3 (2.3%)	1 (6.3%)	7 (31.8%)	<0.001
Subgroup analysis with stage I NSCLC (N=170)	48	96	11	15
≥ Grade 3 RP	0 (0.0%)	2 (2.1%)	1 (9.1%)	4 (26.7%)	<0.001
Subgroup analysis with stage II NSCLC (N=64)	16	36	5	7
≥ Grade 3 RP	1 (6.3%)	1 (2.8%)	0 (0.0%)	3 (42.9%)	0.003

Notes: Data are presented as n or number (%). *Non-COPD, non-CPFE, and non-IPF.

Abbreviations: COPD, chronic obstructive pulmonary disease; CPFE, combined pulmonary fibrosis and emphysema; IPF, idiopathic pulmonary fibrosis; RP, radiation pneumonitis.