Figure 1

Motives explaining failure to donate in cohort 1 and 2. *The reasons for which potential donors did not actually donate differed between period 1 and 2 in terms of ABO or crossmatch incompatibility (16% in cohort 1 versus 3% in cohort 2, p < 0.001), priority given to another donor (4% in cohort 1 versus 15% in cohort 2, p < 0.001), lack of follow-up on the part of the donor (21% in cohort 1 versus 8% in cohort 2, p < 0.001), and an evaluation that is still being processed (0% in cohort 1 versus 10% in cohort 2, p < 0.001).