Table 4.

Association of risk factors with SARS-CoV-2-specific antibody positivity.

	Antibody negative	Antibody positive	OR	95% CI	p-value
Diabetes type 2	1.0%	4.8%	6.93	1.85–25.88	0.0040
Previous swab test performed	2.3%	27.0%	11.61	6.12–22.02	< 0.0001
Travelling in an area with warning	3.5%	15.9%	3.62	1.70–7.71	0.0008
Age by decade	46.5 (20.4)	40.7 (20.4)	0.84	0.71–0.99	0.0346
Systemic low-grade inflammation	21.4%	6.5%	0.29	0.10–0.83	0.0211

OR odds ratio, CI confidence interval.