Table 4.

Multivariate COX regression analysis

Factors	HR (95% CI)	p
CT Scan		0.845
One lung is involved	33,988.00 (0, 2.245E+156)	0.953
Both lungs are involved	12,464.47 (0, 8.101E+155)	0.958
Oxygenation index	0.982 (0.964, 1.000)	0.051
Creatinine	0.995 (0.969, 1.022)	0.7
Urea nitrogen	1.020 (0.713, 1.459)	0.913
White blood cell	1.422 (0.921, 2.195)	0.112
Uric acid	1.004 (0.996, 1.013)	0.295
Albumin	0.763 (0.596, 0.978)	0.033

HR, hazard ratio; CI, confidence interval.