Blood donors No./total (%) Hb (g/dl) mean ± SD Ferritin (ng/ml) mean ± SD EPO (mlU/mL) mean ± SD
First-time Male 50/73 (68.5) 15.8 ± 1.0 129.5 ± 72.1 7.9 ± 3.9
Female 23/73 (31.5) 13.6 ± 0.9 52.5 ± 34.7 8.7 ± 4.5
Total 73/147 (49.7) 15.1 ± 1.4 105.3 ± 72.1 8.2 ± 4.1
Regular Male 58/74 (78.4) 15.4 ± 1.2 78.5 ± 70.2 8.0 ± 4.4
Female 16/74 (21.6) 13.6 ± 0.6 36.1 ± 33.0 8.4 ± 6.6
Total 74/147 (50.3) 15.0 ± 1.3 69.3 ± 66.2 8.1 ± 4.9
  P-value   0.055 0.014* 0.481
The mean age of all donors was 31.3 ± 11.1 (range: 17-59 years). *Statistically significant increased (p=0.014) serum ferritin of the first-time compared to regular donors. Hb: Haemoglobin; EPO: Erythropoietin
Table 1: Haemoglobin, serum erythropoietin and ferritin levels in the first-time and regular donors.