Table 3.

Characterization of vaxEffect@UniMiB users for the age stratification.^a

Age (years)	Medical history (N=2733), n (%)	Dose 1			Dose 2			Dose 3
		Admin.b (N=2360), n (%)	ADRc (N=2226), n (%)	Admin. (N=1779), n (%)		ADR (N=1610), n (%)	Admin. (N=179), n (%)		ADR (N=169), n (%)
<30	1301 (47.6)	1024 (43.4)	962 (43.2)	955 (53.7)		861 (53.5)	64 (35.8)		59 (34.9)
30-55	1109 (40.6)	1043 (44.2)	983 (44.2)	634 (35.6)		575 (35.7)	80 (44.7)		76 (45.0)
>55	323 (11.8)	293 (12.4)	281 (12.6)	190 (10.7)		174 (10.8)	35 (19.5)		34 (20.1)

^aEach cell reports the absolute and the relative frequency computed for the sample size N reported in the column headings.

^bAdmin.: individuals who submitted their vaccination data.

^cADR: adverse drug reaction (individuals who registered their ADRs 7 days postvaccination).