Table 2: Cox Regression Analysis of 1-Year Mortality in Acute Heart Failure Patients Stratified by Prognostic Nutritional Index and BMI.

Subgroups	Unadjusted			Adjusted
	HR	95% CI	p-value	HR	95% CI	p-value
High PNI
18.5–24.9 kg/m2	Ref			Ref
25–29.9 kg/m2	0.71	[0.43–1.16]	0.175	0.89	[0.52–1.50]	0.656
≥30 kg/m2	0.38	[0.20–0.71]	0.003**	0.48	[0.24–0.95]	0.035*
Low PNI
18.5–24.9 kg/m2	Ref			Ref
25–29.9 kg/m2	1.30	[0.78–2.10]	0.330	1.39	[0.78–2.50]	0.264
≥30 kg/m2	1.10	[0.63–1.80]	0.797	1.08	[0.59–2.00]	0.798

*p<0.05; **p<0.01. Adjusted for age, sex, confirmed COVID-19 infection, carbamide, eosinophils, haemoglobin, soluble urokinase plasminogen activator receptor and C-reactive protein. PNI = prognostic nutritional index; Ref = reference.