Table 3.

Multivariate analysis of factors associated with mortality.

Variables	OR (95% CI)	p
Age	1.045 (1.024−1.066)	<0.001
Charlson (≥ 3 vs <3)	1.835 (1.07−3.148)	0.027
Heart failure on admission	5.993 (1.625−21.659)	0.007
Influenza vaccine	1.545 (0.963−2.477)	0.071