Table 4.

Univariate and multivariate linear regression analysis of factors predicting oxygen demand in COVID-19 patients.

Variable	Univariate analysis			Multivariate analysis
	OR	95% CI	p value	OR	95% CI	p value
Age, years	1.03	(1.00, 1.05)	0.020	1.02	(0.99, 1.05)	0.223
Sex, male	1.74	(0.91, 3.32)	0.095
BMI, kg/m2	1.08	(1.01, 1.16)	0.034	0.95	(0.84, 1.06)	0.348
Smoking history, yes	1.20	(0.66, 2.19)	0.553
Diabetes mellitus	2.17	(1.10, 4.27)	0.026	0.93	(0.38, 2.27)	0.869
Cardiovascular diseases	2.73	(1.47, 5.08)	0.002	1.72	(0.76, 3.90)	0.191
The liver-to-spleen ratio	0.10	(0.27, 0.39)	<0.001	0.14	(0.02, 0.93)	0.042
Lymphocyte count, /μL	0.999	(0.998, 1.00)	0.003	0.999	(0.998, 1.00)	0.045
D-dimer, μg/mL	5.52	(2.18, 14.00)	<0.001	4.64	(1.60, 13.40)	0.043
Abdominal circumference under the diaphragm, cm	1.05	(1.02, 1.09)	0.003	1.09	(1.01, 1.18)	0.024
The visceral fat area under the diaphragm, cm2	1.01	(1.00, 1.02)	0.007	0.99	(0.99, 1.00)	0.340

BMI, body mass index.