Table 2.

Summary of the main variables* collected or derived from the cohort

Variables	Information collected before vaccination/infection	Information collected after vaccination/infection	Information routinely collected at predonation screening
Internal data
Donor questionnaire
Demographics: age/sex/health region/ethnicity	X	X	X
BMI calculated with	X	X	X
Height	X	X	X
Weight	X	X	X
Blood pressure†	X
Diabetes profile and treatment (without insulin)‡	X	X	X
COVID-19 vaccination status§	X	X	X
History of PCR-confirmed infection§	X	X	X
Laboratory tests
Haemoglobin level	X	X	X
Blood type (ABO and Rh genotype or phenotype)	X	X	X
External data
COVID-19 vaccination status¶	X	X	X
History of PCR-detected infection**	X	X	X

*Several other variables such as donor deferrals, infectious state, etc are routinely collected but are not presented in this table.

†Available only for a subset of blood donor before the COVID-19 pandemic.

‡Diabetes treated with insulin is an exclusion criterion for blood donation.

§Reported by the donor.

¶From the provincial vaccination registry Système d’information pour la protection des maladies infectieuses.

**From the provincial COVID-19 infection registry Trajectoire de Santé Publique.

BMI, body mass index.