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

Table 2

Association between demographic characteristics of the participants and their knowledge about blood donation.

Demographic characteristics	Blood donation knowledge		value
	score (0–9)
	Median	Mean rank
Age (years)
<20	4	119.9°	0.004^♦
20–30	5	186.7^▪
31–50	5	179.0
>50	4.5	161.8
Gender
Males	6	191.9	0.003^*
Females	5	160.6
Marital status
Single	5	158.9	0.042^*
Married	5	182.3
Level of education
Illiterate	4	95.2°	<0.001^♦
Below high school	4	141.8
High school	5	180.7
University	6	203.7
Postgraduate	7	229.6^▪
Occupation
Military	6	195.6	<0.001^♦
Civil	6	212.1^▪
Student	4	127.1°
Unemployed	4	142.5

Mann-Whitney test.
^♦Kruskal-Wallis test.
^▪Highest mean rank.
°Lowest mean rank.