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  • Title: The influence of blood donation on iron stores assessed by serum ferritin and hemoglobin in a population survey of 1359 Danish women.
    Author: Milman N, Kirchhoff M.
    Journal: Ann Hematol; 1991 Jul; 63(1):27-32. PubMed ID: 1878420.
    Abstract:
    The general impact of blood donation on iron status was studied in a population survey comprising 1359 nonpregnant Danish women in age cohorts of 30, 40, 50, and 60 years; 809 were premenopausal and 550 postmenopausal; 180 (13%) were blood donors. Iron stores were assessed by serum (S)-ferritin and hemoglobin (Hb). Hb levels were not significantly different in donors: mean 137 +/- 10 (SD) g/l (8.5 +/- 0.6 mmol/l) compared with nondonors, 139 +/- 11 g/l (8.6 +/- 0.7 mmol/l). Values less than 121 g/l (7.5 mmol/l) were observed in 3.3% of donors vs 3.8% of nondonors. Correlations between S-ferritin and Hb were without practical relevance: rs = 0.29, p less than 0.0001 in donors vs rs = 0.22, p less than 0.0001 in nondonors. Blood donation had a profound influence on iron status, especially in the premenopausal women population. Donors had lower S-ferritin than nondonors in all age-groups and in pre- and postmenopausal groups (p less than 0.001 in all groups). Premenopausal donors had a median S-ferritin of 31 micrograms/l vs 39 micrograms/l in nondonors, postmenopausal donors of 47 micrograms/l vs 72 micrograms/l in nondonors. S-ferritin values less than 15 micrograms/l (i.e., depleted iron stores) were observed in 31.7% of premenopausal donors vs 15.2% of nondonors, and in 7.0% of postmenopausal donors vs 2.9% of nondonors. Iron deficiency anemia (i.e., S-ferritin less than 15 micrograms/l and Hb less than 121 g/l) was seen in 2.8% of donors vs 1.5% of nondonors. Donors using oral contraceptives had higher S-ferritin, median 33 micrograms/l compared with nonusers, 22 micrograms/l, and a lower frequency of depleted iron stores, 29% vs 39%. Ideally, the frequency of phlebotomy should be adjusted according to S-ferritin as well as Hb levels. If Hb is used as single criterion for donation, only donors with predonation values greater than or equal to 124-125 g/l should be allowed to undergo phlebotomy.
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