Comparison of Two Waves of COVID-19 in Critically Ill Patients: A Retrospective Observational Study

Table 3

Mortality analysis with 2 or more risk factors.

	Unadj. HR (95% CI)	-value	Adj. HR (95% CI)	-value
Overall	1.14 (1.04–1.25)	<0.01	0.98 (0.9–1.07)	0.62
First wave	1.28 (1.14–1.43)	<0.01	1.06 (0.95–1.19)	0.3
Second wave	0.99 (0.85–1.15)	0.89	0.88 (0.77–1)	0.06