Table 6.

Groups and sample size of training and test–retest phases.

Group	Description	Phase
		Training	Test	Retest
CASES	Patients COVID-19 positive on RT-PCR for SARS-CoV-2	103	24	19
	Positive non vaccinated	87	16	5
	Positive vaccinated	16	8	14
CONTROLS	Patients COVID-19 negative on RT-PCR for SARS-CoV-2	338	124	109
	Negative non vaccinated	102	28	18
	Negative vaccinated	236	96	91