Table 4.

The 30-day all-cause mortality rate in patients with influenza A, influenza B or COVID-19 stratified by blood culture results

	Influenza A		Influenza B		COVID-19
Mortality rate	% (n)	95% CI	% (n)	95% CI	% (n)	95% CI	p value
Overall	7.1 (23)	4.3–9.9	6.4 (21)	3.8–9.1	28.3 (192)	24.9–31.7	<.001**
With positive blood culture	18.9 (7)	6.3–31.5	2.9 (1)	-2.7-8.4	26.2 (16)	15.2–37.3	0.02**
With relevant positive blood culture*	30.8 (4)	5.7–55.9	10.0 (1)	−8.6-28.6	42.9 (3)	6.2–79.5	0.28***

* Corrected for contamination

** Pearson’s chi-squared test

*** Fisher’s exact test

95% CI = 95% confidence interval