Table 3.

Multivariable logistic regression model for ICU admission (viruses compared to A/H1) N = 549

Outcome variable	Independent variable (IV; n = number of patients with IV in ICU/number of patients with IV in model)	Unadjusted OR (95% CI)	Unadjusted P-value	Adjusted OR (95% CI)	Adjusted P-value
ICU admission (n = 66)	Virus (reference: A/H1) (n = 18/63)
	A/H3 (n = 18/173)	0.290 (0.140–0.604)	0.001	0.390 (0.181–0.842)	0.016
	INF-B (n = 8/72)	0.312 (0.125–0.781)	0.013	0.385 (0.151–0.984)	0.046
	hMPV (n = 4/80)	0.132 (0.042–0.413)	0.001	0.158 (0.049–0.507)	0.002
	PIV (n = 7/66)	0.297 (0.114–0.771)	0.013	0.364 (0.135–0.979)	0.045
	RSV (n = 11/95)	0.327 (0.142–0.753)	0.009	0.389 (0.162–0.936)	0.035
	COPD (n = 18/92)	1.311 (0.975–7.763)	0.073	2.762 (1.438–5.306)	0.002
	Female (n = 26/269)	0.635 (0.496–0.812)	<0.001	0.635 (0.367–1.098)	0.104
	Age group (reference: 18–49 years, n = 22/127)
	50–64 years (n = 23/146)	0.968 (0.714–1.313)	0.836	0.794 (0.404–1.560)	0.503
	65+ years (n = 21/276)	0.495 (0.370–0.663)	<0.001	0.356 (0.177–0.715)	0.004