Knowledge, Attitudes, and Motivations towards Blood Donation among King Abdulaziz Medical City Population

Table 4

Association between history of blood donation among participants and their total knowledge score about blood donation.

History of blood donation	Blood donation total knowledge		value^*
	score (0–9)
	Median	Mean rank
Yes	6	199.9	<0.001
No	5	154.0

Mann-Whitney test.