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CompletedNCT00558454JOHNUpdated Mar 26, 2020

Iron Supplementation of Marginally Low Birth Weight Infants

A Phase 4 interventional study of Iron in Anemia, Iron-Deficiency and Child Behavior Disorders, sponsored by Umeå University. Completed at 2 sites in Sweden. Open to participants aged 39 Days to 45 Days, including healthy volunteers. Per ClinicalTrials.gov, last updated 2020-03-26.

Sponsored by Umeå University · Phase 4, Interventional, and Prevention

From the registry’s dates

  • Registered 3 years 8 months after the study started (first participant enrolled Mar 2004, registered Nov 2007).
Phase
Phase 4
Study type
Interventional
Enrollment
380
Allocation
Randomized
Ages
39 Days to 45 Days
Sex
All
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Study summary

Iron is essential for brain development and there is a well established association between iron deficiency in infants and poor neurological development. In Sweden, about 5% of newborns have low birth weight (\< 2500 g). Due to small iron stores at birth and rapid postnatal growth, they have increased risk of iron deficiency and it is therefore important to prevent iron deficiency in this population. However, excessive iron supplementation can have adverse effects in infants such as growth impairment. In a randomized, controlled trial, we are investigating the effects of 0, 1 or 2 mg/kg/d of iron on brain myelination, cognitive development and growth in low birth weight infants.

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Conditions studied

  • Anemia
  • Iron-Deficiency
  • Child Behavior Disorders
  • Cognitive Manifestations

Keywords

  • Iron supplements
  • Infant
  • Low birth weight
  • Prevention of iron deficiency and its physiological consequences
  • Safety
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In context

Anemia

1,810 studies on the registry are indexed under Anemia; 215 are open to participants now.

This study's enrollment of 380 is above the median of 117 across 1,336 interventional studies indexed under Anemia.

Browse Anemia studies →

Lead sponsor

Umeå University is the lead sponsor of 272 studies on the registry; 60 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
39 Days to 45 Days
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Marginally low birth weight (2000-2500 g)
  • Healthy at inclusion(6 weeks of age)
  • No previous blood transfusion
  • No previous iron supplementation

Exclusion criteria

Exclusion Criteria:

  • Anemia at inclusion
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Study design

Phase
Phase 4
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
380 participants (actual)

Study arms

  • Placebo comparator
    1

    Placebo

    Drug: Iron

  • Experimental
    2

    1 mg/kg/day from age 6 weeks to 6 months

    Drug: Iron

  • Experimental
    3

    2 mg/kg/day from age 6 weeks to 6 months

    Drug: Iron

Interventions

  • DrugIron

    Ferrous succinate mixture

    Also known as: Ferromyn S, AstraZeneca, Södertälje, Sweden

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What researchers measure

Primary outcomes

  1. Neurological developement

    6 mo: Auditory brain stem response (central conduction time) 3 y: CBCL - Parental questionnaire assessing behavioral problems and WIPPSI - test of cognitive functions 7 y: SDQ, 5-15 and CBCL - Parental questionnaires assessing behavioral problems, TeAch - test of behavioral problems and WISC - test of cognitive functions.

    Time frame: 6 months, 3 years and 7 years

Secondary outcomes

  1. Growth (weight, length, head circumference, knee-heel length), Morbidity and Iron status (Hemoglobin, ferritin etc)

    Time frame: 6 months

  2. Growth, Iron status, and Morbidity

    Time frame: 3 years and 7 years

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Study locations

2 sites
  • Karolinska Hospital (including Danderyd Hospital)
    Stockholm, Sweden
  • Umeå University Hospital
    Umeå, SE-90185, Sweden
08

References and documents

Publications

  • Lindberg J, Norman M, Westrup B, Domellof M, Berglund SK. Lower systolic blood pressure at age 7 y in low-birth-weight children who received iron supplements in infancy: results from a randomized controlled trial. Am J Clin Nutr. 2017 Aug;106(2):475-480. doi: 10.3945/ajcn.116.150482. Epub 2017 Jun 28. PubMed 28659293 ↗
  • Lindberg J, Norman M, Westrup B, Ohrman T, Domellof M, Berglund SK. Overweight, Obesity, and Body Composition in 3.5- and 7-Year-Old Swedish Children Born with Marginally Low Birth Weight. J Pediatr. 2015 Dec;167(6):1246-52.e3. doi: 10.1016/j.jpeds.2015.08.045. Epub 2015 Sep 26. PubMed 26394823 ↗
  • Berglund SK, Westrup B, Domellof M. Iron supplementation until 6 months protects marginally low-birth-weight infants from iron deficiency during their first year of life. J Pediatr Gastroenterol Nutr. 2015 Mar;60(3):390-5. doi: 10.1097/MPG.0000000000000633. PubMed 25406528 ↗
  • Berglund SK, Lindberg J, Westrup B, Domellof M. Effects of iron supplements and perinatal factors on fetal hemoglobin disappearance in LBW infants. Pediatr Res. 2014 Nov;76(5):477-82. doi: 10.1038/pr.2014.116. Epub 2014 Aug 13. PubMed 25119339 ↗
  • Berglund SK, Westrup B, Hagglof B, Hernell O, Domellof M. Effects of iron supplementation of LBW infants on cognition and behavior at 3 years. Pediatrics. 2013 Jan;131(1):47-55. doi: 10.1542/peds.2012-0989. Epub 2012 Dec 10. PubMed 23230066 ↗
  • Berglund S, Lonnerdal B, Westrup B, Domellof M. Effects of iron supplementation on serum hepcidin and serum erythropoietin in low-birth-weight infants. Am J Clin Nutr. 2011 Dec;94(6):1553-61. doi: 10.3945/ajcn.111.013938. Epub 2011 Nov 9. PubMed 22071701 ↗
  • Berglund S, Westrup B, Domellof M. Iron supplements reduce the risk of iron deficiency anemia in marginally low birth weight infants. Pediatrics. 2010 Oct;126(4):e874-83. doi: 10.1542/peds.2009-3624. Epub 2010 Sep 6. PubMed 20819898 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 26, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT00558454
Lead sponsor
Umeå University
Collaborators
The Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (FORMAS), Jerring Foundation, Sweden, Oskar Foundation
Responsible party
Magnus Domellöf (MD, PhD, Umeå University) — Principal investigator
First posted
Nov 15, 2007
Start date
Mar 2004
Primary completion
Jun 2008
Completion
Nov 2014
Last update
Mar 26, 2020

Study contacts

Magnus Domellöf, MD, PhD
principal investigator · Umeå University, Sweden

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Mar 2020. You cannot join it, but the record below documents what was studied.

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