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Prevalence and determinants of declining versus stable hemoglobin levels in whole blood donors
Author(s) -
Nasserinejad Kazem,
van Rosmalen Joost,
van den Hurk Katja,
Baart Mireille,
Hoekstra Trynke,
Rizopoulos Dimitris,
Lesaffre Emmanuel,
de Kort Wim
Publication year - 2015
Publication title -
transfusion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.045
H-Index - 132
eISSN - 1537-2995
pISSN - 0041-1132
DOI - 10.1111/trf.13066
Subject(s) - hemoglobin , blood donor , donation , demography , medicine , immunology , economics , economic growth , sociology
BACKGROUND A too short recovery time after blood donation results in a gradual depletion of iron stores and a subsequent decline in hemoglobin (Hb) levels over time. This decline in Hb levels may depend on individual, unobserved characteristics of the donor. STUDY DESIGN AND METHODS We used a data set of 5388 Dutch blood donors from the Donor InSight study. The statistical analysis is based on a Bayesian growth mixture model, which assumes that each donor belongs to one of several groups. Each group implies a different Hb trajectory, and donors with similar longitudinal trajectories belong to the same group. Analyses were performed for male and female donors separately. RESULTS For both sexes the model identified four groups of donors. Stable Hb trajectories were found among 14% of male donors and 15% of female donors; declining Hb trajectories were observed in the remaining groups of donors. The percentage of donor deferrals differed strongly between groups. CONCLUSION The model can be used to predict to which group a donor belongs, and this prediction can be updated after each donation. This is of high practical importance because early identification of donors with declining Hb levels could help to tailor donation intervals and to prevent iron deficiency and donor deferrals.