Table 3.

Logistic regressions’ estimates.

	Admission to ICU		Mechanical ventilation		Death		Adverse outcome		Duration of hospitalization
	ARR (95 % CI)	p-value	ARR (95 % CI)	p-value	ARR (95 % CI)	p-value	ARR (95 % CI)	p-value	ΙRR (95 % CI)	p-value
COVID-19 vaccination
no vaccination	ref.		ref.		ref.		ref.		ref.
partial vaccination	0.46 (0.22–0.96)	0.037	0.47 (0.22–1.04)	0.062	0.72 (0.50–1.02)	0.066	0.62 (0.45–0.87)	0.006	0.86 (0.75–0.99)	0.03
full (booster) vaccination	0.49 (0.29–0.84)	0.009	0.43 (0.23–0.80)	0.007	0.57 (0.42–0.78)	<0.001	0.54 (0.41–0.72)	<0.001	0.79 (0.70–0.89)	<0.001
Diagnosis to admission*	1.16 (1.09–1.24)	<0.001	1.10 (1.03–1.16)	0.002	1.03 (0.99–1.07)	0.095	1.05 (1.02–1.09)	0.002	1.03 (1.01–1.04)	<0.001
Age	1.02 (1.00–1.03)	0.014	1.01 (1.00–1.03)	0.038	1.06 (1.05–1.07)	<0.001	1.05 (1.04–1.06)	<0.001	1.01 (1.00–1.01)	<0.001
Sex
male	ref.		ref..		ref.		ref.		ref.
female	0.88 (0.56–1.37)	0.564	0.81 (0.55–1.50)	0.708	0.94 (0.72–1.22)	0.63	0.88 (0.69–1.11)	0.276	0.89 (0.80–0.99)	0.027
Comorbidities
none	ref.		ref.		ref.		ref.		ref.
one	1.02 (0.56–1.85)	0.952	0.94 (0.50–1.76)	0.856	1.37 (0.89–2.12)	0.148	1.22 (0.84–1.76)	0.29	1.01 (0.89–1.15)	0.906
two	0.90 (0.48–1.69)	0.735	1.01 (0.53–1.93)	0.98	1.48 (0.94–2.33)	0.092	1.29 (0.87–1.90)	0.201	1.16 (1.00–1.36)	0.052
three or more	1.84 (0.82–3.67)	0.086	1.17 (0.48–2.86)	0.728	2.47 (1.55–3.93)	<0.001	2.10 (1.41–3.13)	<0.001	1.17 (0.98–1.39)	0.077

All regression models included hospital fixed-effects.

COVID-19: coronavirus disease 2019; ICU: intensive care unit; ARR: adjusted relative risk; IRR: incidence rate ratio; CI: CI: confidence interval; Ref: reference.

^*time elapsed from diagnosis to admission (days).