Table 2.

Cox Proportional Hazard Analysis For Factors Associated With Overall Survival (N=234)

Characteristics	Hazard Ratio	95% CI	P Value
Crude
Control	Reference
COPD	0.927	0.564–1.524	0.765
CPFE	2.853	1.343–6.062	0.006
IPF	4.344	2.301–8.201	<0.001
Model 1
Control	Reference
COPD	1.326	0.725–2.425	0.360
CPFE	3.034	1.328–6.931	0.009
IPF	4.246	2.060–8.753	<0.001
Model 2
Control	Reference
COPD	1.306	0.723–2.358	0.376
CPFE	3.382	1.472–7.769	0.004
IPF	4.061	1.963–8.403	<0.001

Notes: Model 1 adjusted for age, smoking status, performance status (ECOG ≤ 1 or ≥ 2), clinical stage (clinical stage I or II), FEV₁≤ 80% pred and DLco≤ 60% pred. Model 2 adjusted for age, smoking status, performance status (ECOG ≤ 1 or ≥ 2), clinical stage (clinical stage I or II), FEV₁≤ 80% pred, DLco≤ 60% pred and Radiotherapy technique.

Abbreviations: CI, confidence interval; COPD, chronic obstructive pulmonary disease; CPFE, combined pulmonary fibrosis and emphysema; IPF, idiopathic pulmonary fibrosis.