Table 2 Univariate analysis and multivariate analysis on 30 days mortality (cox proportional hazard analysis)

Hazard ratio (95% confidence interval)

P-value

Hazard ratio (95% confidence interval)

P-value

Age

1.101 (1.081–1.121)

< 0.001***

1.076 (1.055–1.096)

< 0.001***

Female (vs. Male)

0.806 (0.607–1.071)

0.138

0.769 (0.576–1.027)

0.075

Prior vaccination, Yes (vs. No)

0.483 (2.071–0.343)

< 0.001***

0.576 (0.409–0.812)

0.002**

CURB score

 Low

Ref

Ref

Ref

Ref

 Moderate

4.686 (3.215–6.831)

< 0.001***

3.561 (2.430–5.218)

< 0.001***

 High

16.774 (11.227–25.061)

< 0.001***

11.507 (7.625–17.365)

< 0.001***

CCI score

 0

Ref

Ref

Ref

Ref

 1

0.566 (0.312–1.028)

0.062

0.770 (0.423–1.403)

0.393

 2+

0.802 (0.498–1.292)

0.365

0.995 (0.611–1.621)

0.984