Table 4.

Difference between registered and nonregistered donors.

	Registered donors	Nonregistered donors	P value
Median age	39 years	35 years	0.058a
Females	47%	37%	0.040b
Caucasians	95%	83%	0.001b

^aWilcoxon Mann-Whitney rank-sum test (test of medians).

^bChi-squared test.