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Table 1 Age, sex, donor category and test results of the individuals who donated blood (n = 1599)

From: Seroprevalence of human immunodeficiency virus, hepatitis B and C viruses and syphilis infections among blood donors at the Muhimbili National Hospital in Dar Es Salaam, Tanzania

Number tested and percentage seropositive
  Total sample HIV HBsAg HCV Syphilis
Age      
16–19 109 (7.0%) 107 (2.8%) 109 (8.3%) 109(3.7%) 109(0.0%)
20–29 629 (40.3%) 611 (2.3%) 629(9.2%) 628(0.6%) 629(2.1%)
30–39 497 (31.9%) 487(4.7%) 496(9.7%) 497(2.2%) 495(5.7%)
40–49 234 (15.0%) 224(6.3%) 234(7.3%) 234(1.7%) 234(6.8%)
50–59 78(5.0%) 76(6.6%) 78(10.3%) 78(1.3%) 78(19.2%)
60–69 12(0.8%) 12(0.0%) 12(8.3%) 12(0.0%) 12(16.7%)***
Sex      
Males 1424 (89.1%) 1422(3.8%) 1423(9.1%) 1424(1.5%) 1422(4.8%)
Females 175 (10.9%) 175(4.0%) 175(6.3%) 174(1.1%) 175(4.0%)
Donor category      
Replacement donors 1125 (70.4%) 1116(4.5)* 1124(9.5%) 1125(1.8%) 1123(6.1%)*
Voluntary donors 474 (29.6%) 441(2.0%) 474(7.2%) 473(0.8%) 474(1.5%)
HIV serostatus      
HIV seropositive donors    58(8.6%) 0(0.0%) 58(12.1%)**
HIV seronegative donors    1495(8.7%) 1572(1.6%) 1494(4.6%)
Total 1599 (100%) 1557(3.8%) 1598(8.8%) 1597(1.5%) 1597(4.7%)
  1. Test results are not available for all donors
  2. *Significantly higher prevalence among replacement donors (P < 0.05)
  3. **Significantly higher prevalence among HIV seropositive donors (P < 0.05)
  4. *** Significant age differences in the prevalence of syphilis (P < 0.0001)