Evidence map›Paper›PMID 32163187›Full record

ArticleTransfusion2020

Genetic and behavioral modification of hemoglobin and iron status among first-time and high-intensity blood donors.

Alan E Mast, John C Langer, Yuelong Guo, Walter Bialkowski, Bryan R Spencer, Tzong-Hae Lee, Joseph Kiss, Ritchard G Cable, Donald Brambilla, Michael P Busch and 2 more

Open access · greenAbstract read
In one paragraph

Article in Transfusion, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
1.3field-weighted citation impact, top 18% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed, 12 citations in OpenAlex.

  1. Relationship of Genetic Variability (Health science reports · 2026
    Article
  2. Article
  3. Iron Deficiency Anemia.Advances in experimental medicine and biology · 2025
    Review
  4. Article
  5. Article
  6. Review
  7. Article
  8. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors at 6 institutions in 1 country.

Alan E MastBlood Research Institute Versiti, Milwaukee, Wisconsin, USA.ORCID 0000-0003-3740-0318
John C LangerRTI International, Bethesda, Maryland, USA.
Yuelong GuoRTI International, Durham, North Carolina, USA.
Walter BialkowskiBlood Research Institute Versiti, Milwaukee, Wisconsin, USA.
Bryan R SpencerAmerican Red Cross Scientific Affairs, Dedham, Massachusetts, USA.ORCID 0000-0002-9008-9154
Tzong-Hae LeeVitalant Research Institute, San Francisco, California, USA.
Joseph KissVitalant Northeast Division, Pittsburgh, Pennsylvania, USA.
Ritchard G CableAmerican Red Cross Scientific Affairs, Farmington, Connecticut, USA.
Donald BrambillaRTI International, Bethesda, Maryland, USA.ORCID 0000-0002-7276-4689
Michael P BuschAmerican Red Cross Scientific Affairs, Dedham, Massachusetts, USA.
Grier P PageRTI International, Atlanta, Georgia, USA.
NHLBI Recipient Epidemiology Donor Evaluation Study (REDS)-III
RTI International · USAmerican Red Cross · USMedical College of Wisconsin · USPacific Research Institute · USVersiti Blood Center of Wisconsin · USVitalant · US

Funding

American Red CrossBlood Systems Research InstituteNHLBI NIH HHS 00002INHLBI NIH HHS 00003INHLBI NIH HHS 00004INHLBI NIH HHS 00005INHLBI NIH HHS 00006INHLBI NIH HHS 00007INHLBI NIH HHS 00008INHLBI NIH HHS 00009INHLBI NIH HHS HHSN2682011-00001INHLBI NIH HHS HHSN268201100003INIH HHSSchool of MedicineUniversity of British ColumbiaUniversity of California, San FranciscoVAYale University
6 · The paper itself

Abstract

backgroundSome people rapidly develop iron deficiency anemia following blood donation, while others can repeatedly donate without becoming anemic.

methodsTwo cohorts of blood donors were studied. Participants (775) selected from a 2-year longitudinal study were classified into six analysis groups based on sex, donation intensity, and low hemoglobin deferral. Associations with iron supplement use, cigarette smoking, and four genetic variants of iron metabolism were examined at enrollment and with longitudinal regression models. An unbiased assessment of genetic variability and ability to repeatedly donate blood without experiencing low hemoglobin deferral was conducted on participants (13,403) in a cross-sectional study who were examined by genome wide association (GWA).

resultsBehaviors and genetic variants were associated with differences in hemoglobin and ferritin change following repeated donation. At least weekly iron supplement use was associated with improved status in first-time donors, while daily use was associated with improved status in high-intensity donors. Cigarette smoking was associated with 0.5 g/dL increased hemoglobin in high-intensity donors. A736V in TMPRSS6 was associated with a rapid drop in hemoglobin and ferritin in first-time females following repeated donation. Conversely, the protective TMPRSS6 genotype was not enriched among high-intensity donors. H63D in HFE was associated with increased hemoglobin in female high-intensity donors. However, no differences in genotype between first-time and high-intensity donors were found in GWA analyses.

conclusionBehavioral and genetic modifiers contributed to first-time donor hemoglobin and iron status, while iron supplement use was more important than underlying genetics in high-intensity donors.

Indexed as

Blood DonorsAnemia, Iron-DeficiencyCross-Sectional StudiesDietary SupplementsFemaleFerritinsGenome-Wide Association StudyGenotypeHemoglobinsHumansIronLongitudinal StudiesMaleSex FactorsFerritinsHemoglobinsIron

Identifiers

PMID32163187
PMCPMC7393610
OpenAlexW3011831047

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.