Table 2.

Univariate and multivariate logistic regression models for 28-day mortality in critically ill patients with COVID-19

Parameters	Univariate analysis		Multivariate analysis
	Odds ratio (95% confidence intervals)	p-value	Odds ratio (95% confidence intervals)	p-value
Age (years)	1.06 (1.01–1.09)	0.020*	1.15 (1.03–1.21)	0.022*
ICU length of stay (days)	1.07 (1.03–1.14)	0.001*	1.11 (1.06–1.16)	0.069
SpO2/FiO2 ratio	0.93 (0.82–0.97)	0.001*	0.94 (0.91–0.97)	0.009*
White blood cells (109/l)	1.20 (1.14–1.33)	0.001*	1.26 (1.06–1.51)	0.061
Lymphocytes (109/l)	0.95 (0.91–0.98)	0.001*	0.95 (0.92–0.97)	0.052
d-dimers (mcg/ml)	2.20 (1.70–2.70)	0.001*	2.54 (1.57–3.12)	0.011*
Lactate (mmol/l)	3.1 (2.2–4.7)	0.001*	3.9 (2.4–4.9)	0.035*
Pulmonary embolism	2.80 (1.92–3.31)	0.003*	2.91 (2.65–3.36)	0.019*
Active smoking	2.6 (2.03–3.50)	0.037*	3.00 (2.51–3.66)	0.025*

^*p < 0.05 were statistically significant.