Table 2.

Variables associated with 20-day all-cause mortality in respiratory syncytial virus and influenza infection

	Univariate analysis		Multivariate analysis
Variables	HR (95% CI)	P value	HR (95% CI)	P value
RSV infection	2.83 (1.47-5.43)	< 0.01	2.32 (1.17-4.58)	0.01
Sex	1.88 (0.96-3.70)	0.06	1.87 (0.94-3.73)	0.07
Age	1.02 (0.99-1.04)	0.08	1.00 (0.98-1.03)	0.50
COPD	4.31 (1.97-9.43)	< 0.01	2.97 (1.28-6.90)	0.01
Body temperature (BT) >37.5 °C	0.79 (0.38-1.63)	0.52	1.08 (0.50-2.35)	0.82
Pneumonia	2.00 (1.04-3.84)	0.03	1.72 (0.84-3.51)	0.13
Respiratory Bacterial superinfection	0.89 (0.31-2.52)	0.83	0.56 (0.19-1.65)	0.29
Hypoxemia (< 60 mmHg)	1.79 (0.94-3.43)	0.07	1.05 (0.51-2.18)	0.87

The variables, resident of long-term care facilities and pneumonia severity index score, were not included due to collinearity

RSV respiratory syncytial virus, COPD chronic obstructive pulmonary disease, HR hazard ratio, CI confidence interval. Hazard ratios were calculated using a Cox Proportional hazards regression model