Table 4.

Associations between different factors and the severity of the reinfection (i.e. severe+critical vs. mild) in Vojvodina, Serbia, Mar 2020–Jan 2022.

	Univariate Models				Multivariate Modelsa
	OR	95% CI		p-value	OR	95% CI		p-value
Occupation
Health-care workers (HCWs)	0.81	0.37	1.78	0.608	0.87	0.40	1.93	0.737
Non-HCWsb	Reference group				Reference group
Retired	7.27	4.92	10.76	<0.001	3.00	1.63	5.52	<0.001
Number of comorbidities
0	Reference group				Reference group
1	2.81	1.82	4.32	<0.001	1.58	1.00	2.50	0.051
2	5.53	2.97	10.30	<0.001	2.59	1.35	4.99	0.004
≥3	4.98	1.54	16.07	0.007	2.10	0.64	6.93	0.224
Severity of primary infection
Mild	Reference group				Reference group
Severe	7.35	4.84	11.17	<0.001	5.01	3.26	7.71	<0.001
Critical	221.40	48.74	1005.65	<0.001	189.00	39.13	912.95	<0.001

^aadjusted for age (continuous) and gender.

^bNon-HCWs included professions that provide various services, other employment categories as well as retired individuals.