TABLE 2.

Donor characteristics associated with SARS‐COV‐2 antibody reactivity

		Unadjusted OR (95% CI)	Adjusted a OR (95% CI)
Region	British Columbia	1.5 (0.9, 2.4)	1.4 (0.9, 2.3)
	Alberta	1.2 (0.8, 2.0)	1.2 (0.7, 1.9)
	Prairie	1.5 (0.9, 2.6)	1.5 (0.9, 2.6)
	Ontario	2.4 (1.6, 3.5)	2.2 (1.5, 3.3)
	Atlantic Canad	REF	REF
Sex	Female	REF	REF
	Male	1.0 (0.9, 1.2)	1.0 (0.9, 1.3)
Age	17‐24	1.3 (0.9, 1.8)	1.1 (0.8, 1.7)
	25‐35	1.2 (0.9, 1.6)	1.2 (0.9, 1.6)
	35‐45	0.8 (0.5, 1.0)	0.8 (0.6, 1.2)
	46‐55	REF	REF
	55‐65	1.0 (0.7, 1.3)	1.1 (0.8, 1.5)
	65+	1.1 (0.8, 1.5)	1.3 (1.0, 1.9)
Ethnicity b , c	White	REF	REF
	Indigenous	1.2 (0.5, 2.8)	1.4 (0.6, 3.1)
	Asian	1.6 (1.1, 2.3)	1.6 (1.1, 2.3)
	Others	1.6 (1.2, 2.0)	1.5 (1.0, 1.9)
Social deprivation index c	1	REF	REF
	2	0.7 (0.5, 1.0)	0.8 (0.6, 1.0)
	3	0.8 (0.6, 1.1)	0.9 (0.7, 1.2)
	4	0.8 (0.6, 1.1)	0.9 (0.7, 1.2)
	5	0.9 (0.7, 1.1)	0.9 (0.7, 1.2)
Material deprivation index c	1	REF	REF
	2	0.8 (0.6, 1.1)	0.8 (0.6, 1.1)
	3	1.4 (1.1, 1.8)	1.3 (1.0, 1.7)
	4	1.1 (0.8, 1.4)	1.0 (0.7, 1.4)
	5	1.4 (1.0, 1.9)	1.2 (0.9, 1.7)
ABO groups	A	REF	REF
	AB	1.2 (0.7, 1.9)	1.1 (0.7, 1.8)
	B	1.0 (0.7, 1.3)	0.9 (0.6, 1.2)
	O	1.1 (0.9, 1.3)	1.0 (0.9, 1.3)

Note: Statistically significantly results are bolded.

^aAdjusted model includes all variables listed in this table.

^bWhen ethnicity was dichotomized, ethnic minorities had aOR of 1.5 (95% CI 1.1, 1.9) compared to white donors.

^cMissing values are treated as Missing Completely at Random (MCAR) were excluded from the analysis.