Table 4.

Multivariate Cox regression for PhA and hydration status as predictors of mortality in COVID-19 patients.

	Phase angle (°)		Hydration (%)
	HR (CI)	p	HR (CI)	p
Crude model	2.480 (1.604–3.835)	<0.001	1.115 (1.039–1.197)	0.003
Model 1	2.281 (1.365–3.813)	0.002	1.097 (1.015–1.180)	0.014
Model 2	2.507 (1.455–4.318)	0.001	1.112 (1.024–1.209)	0.012
Model 3	3.912 (1.322–11.572)	0.014	NA

The Hazard ratio (HR) for death was expressed per 1° decrease in PhA and 1% increase in hydration percentage, for a univariate model and sequential adjustment models. Dependent variable: survivors (0) vs. non-survivors (1). Cox regression was expressed by HR and 95% confidence interval (CI). NA (not applicable).

Model 1: adjusted for sex, age and BMI.

Model 2: additionally adjusted for diagnosis previous of type 2 diabetes, high blood pressure, dyslipidaemia and heart disease.

Model 3: additionally adjusted for hydration status.