Table 2. Predicting factors of survival outcome by univariate and multivariate analysis.

	Median	Univariate		Multivariate
Variables (No.)	survival	HR (95% CI)	p-value	HR (95% CI)	p-value
	(month)
Performance status
ECOG ≤ 1 (148)	13.7
ECOG ≥ 2 (128)	5.9	0.43 (0.33∼0.55)	<0.01	0.41 (0.29∼0.57)	<0.01
Tuberculosis
With TB (52)	11.6
Without TB (224)	8.8	0.61 (0.43∼0.86)	<0.01	0.68 (0.48∼0.97)	<0.05
Pathological subtype
Squamous cell carcinoma(100)	11.1
Adenocarcinoma (129)	8.4	0.73 (0.51∼1.05)	0.10
NSCLC, undetermined (47)	8.7	0.83 (0.59∼1.17)	0.29
Gender
Female (84)	10.7
Male (192)	8.7	0.83 (0.63∼1.08)	0.16	0.63 (0.48∼0.83)	<0.05
Stage
Stage III (109)	12.5
Stage IV (167)	8.2	0.64 (0.50∼0.83)	<0.01	0.62 (0.47∼0.80)	<0.01
Smoking status
Non-smoker (104)	9.4
Smoker or ex-smoke (172)	9.0	0.91 (0.71∼1.17)	0.47
Treatment
With treatment (204)	11.6
BSC alone (72)	6.6	0.54 (0.41∼0.72)	<0.01	0.90 (0.63∼1.30)	0.58

NSCLC: non-small cell lung cancer, HR: hazard ratio, BSC: best supportive care, TB: tuberculosis.