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Table 1 Gender and age distribution of the participants (N = 1815)

From: ABO and Rhesus blood group distribution and frequency among blood donors at Kilimanjaro Christian Medical Center, Moshi, Tanzania

Characteristic Frequency (n) Percentage (%)
Sex
 Female 218 12
 Male 1597 88
Age (years)
 18–29 773 43
 30–39 530 29
 40–65 508 28
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