Assessing ABO/Rh Blood Group Frequency and Association with Asymptomatic Malaria among Blood Donors Attending Arba Minch Blood Bank, South Ethiopia

Table 1

Sociodemographic characteristics and clinical history of blood donors attending Arba Minch Blood Bank from February to June 2015.

Variables	Frequency
	Number ()	Percent (%)
Sex
Male	232	55.8
Female	184	44.2
Age group
18–27	355	85.3
28–37	48	11.6
>37	13	3.1
Marital status
Single	339	81.5
Married	77	18.5
Total	416	100
Educational level
Illiterate	112	26.9
Primary	21	5.0
Secondary	76	18.3
Tertiary	207	49.8
Occupation
House wife	14	3.3
Peasant/agriculture	117	28.1
Employed	141	33.9
Business/shop	79	19.1
Student	65	15.6
Previous malaria infection
Yes	154	37
No	262	63
Time of last malaria episode
2–6 months	18	11.7
>6 months	84	54.5
Do not remember the time	52	33.8
Use of bed net the previous night
Yes	152	36.5
No	264	63.5
Previous history of blood donation
Yes	219	52.6
No	197	47.4
Number of previous donations
Once	124	56.6
2–4 times	78	35.6
>4 times	17	7.8
ABO blood group
O	175	42.1
A	136	32.7
B	87	20.9
AB	18	4.3
Rh blood group
Rh+	386	92.8
Rh−	30	7.2