Table 4.

Multiple Cox regression models predicting lung cancer mortality.

Model	Parameters	HR	95% CI HR	p
I (for serum SOD1 concentration)	Serum SOD1 per 1 pg/mL	1.005	1.002–1.008	<0.001
	Clinical stage IV vs. I	3.22	1.61–6.44	<0.001
	Clinical stage III vs. I	3.25	1.53–6.90	0.002
	Clinical stage II vs. I	0.61	0.22–1.72	0.350
II (for serum SOD2 concentration)	Serum SOD2 per 1 ng/mL	1.30	1.09–1.56	0.005
	Clinical stage IV vs. I	2.55	1.22–5.35	0.013
	Clinical stage III vs. I	3.03	1.40–6.56	0.005
	Clinical stage II vs. I	0.76	0.27–2.15	0.602

SOD1: superoxide dismutase 1; SOD2: superoxide dismutase 2; HR: hazard ratio; CI: confidence interval. Models I and II were adjusted using the following parameters: albumin (continuous), DM (yes/no), clinical stage (I/II/III/IV), platelet count (<150/150–400/>400 × 10³ cells/µL), NLR (<2.67 vs. ≥2.67 arbitrary unit), ceruloplasmin (<0.266 vs. ≥0.266 g/L), CRP (≤10 vs. >10 mg/dL), and GPS (arbitrary unit).