Table 3.

Multivariate analyses of risk factors associated with respiratory failure and all-cause mortality.

Variable	Respiratory failure		All-cause mortality
	Adjusted OR	95% CI	Adjusted OR	95% CI
Age ≥ 60 years old	5.05	2.99–8.52	12.02	7.03–20.54
Sex, male	2.06	1.42–3.01	1.74	1.31–2.30
CCI, per one point increases	1.14	1.06–1.22	1.22	1.16–1.28
COPD	1.03	0.48–2.25	1.80	1.11–2.93

CCI Charlson comorbidity index, COPD chronic obstructive pulmonary disease, OR odds ratio, CI confidence interval.