Table 5.

Covariates associated with death by Cox survival analysis

Covariates	Univariate analysis			Multivariate analysisa
	P	HR	95% CI	P	HR	95% CI
Age	0.339	1.01	0.97–1.06
Dyspnea	0.076	2.86	0.925–8.88
Cough	0.06	3.04	0.92–10.12	0.02	5.18	1.30–20.68
ARDS	0.01	4.44	1.40–14.03
Neutrophil count ≥ 10 g/l	0.01	4.49	1.34–14.93
Platelet count ≤ 120 g/l	0.003	6.06	1.64–22.49	0.003	10.22	2.24–46.75
Lymphocyte count ≤ 0.5 g/l	0.09	2.84	0.77–10.51
Metabolic acidosis ≤ 21 mmol/l	0.02	11.18	1.43–87.51
LDH ≥ 2Nb	0.010	3.99	1.26–12.63	0.016	5.97	1.39–25.71
D-dimer ≥ 4000 UI/l	0.03	4.44	1.11–11.03
CRP ≥ 175 mg/l	<0.001	13.06	1.68–101.41	0.008	19.53	2.15–177.21

ARDS, acute respiratory distress syndrome; CI, confidence interval; CRP, C-reactive protein; HR, hazard ratio; LDH, lactate dehydrogenase.

^aResults of multivariate analysis are provided after adjustment for age.

^b2N refers to 2 times the upper normal limit.