Table 5.

Multivariable survival analysis using Cox's regression model.

Variable	Hazard ratio	Confidence range (95%)	p value
NT-proBNP levels (2 groups: above and below the third quartile border, 8548.5 pg/mL)	0.33	[0.13; 0.75]	0.0132
Age (2 groups: above and below the third quartile border, 82 years old)	0.44	[0.2; 0.9]	0.0319
EF (2 groups: above and below the third quartile border, 50%)	4.06	[2.26; 7.36]	0.0001