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Published on: May 4, 2020
Iron-deficiency anemia and infant development: effects of extended oral iron therapy
B Lozoff1, A W Wolf, E Jimenez
1Center for Human Growth and Development, University of Michigan, Ann Arbor 48109-0406, USA.
Insights
Extended oral iron therapy did not correct lower mental test scores in infants with iron-deficiency anemia. Iron-deficiency anemia may indicate broader socioeconomic and developmental challenges impacting infant cognition.
Area of Science:
- Pediatrics
- Nutritional Science
- Developmental Psychology
Background:
- Iron-deficiency anemia is prevalent in infants globally.
- Anemia can negatively impact cognitive development.
- Previous interventions focused on short-term iron supplementation.
Purpose of the Study:
- To investigate if prolonged oral iron therapy can reverse cognitive deficits in anemic infants.
- To assess the impact of iron treatment on developmental test scores.
Main Methods:
- A double-blind, controlled trial was conducted in Costa Rica.
- 32 anemic infants (12-23 months) received oral iron for 6 months.
- Developmental scores and hematologic status were monitored at baseline, 3, and 6 months.
Main Results:
- Anemic infants consistently scored lower on mental tests compared to nonanemic controls.
- No significant differences were observed in motor test scores.
- Anemic infants exhibited more negative emotional behaviors and came from disadvantaged socioeconomic backgrounds.
Conclusions:
- Persistent lower mental test scores were observed despite successful iron repletion.
- Iron-deficiency anemia may act as a marker for underlying nutritional and familial disadvantages affecting development.
- Further research is needed to address multifactorial influences on infant development.
Objective:
To determine whether extended oral iron therapy corrects lower developmental test scores in infants with iron-deficiency anemia.
Study Design:
Double-blind, controlled trial in Costa Rica involving 32 12- to 23-month-old infants with iron-deficiency anemia and 54 nonanemic control subjects. Anemic infants were treated with orally administered iron for 6 months; half the nonanemic children were treated with iron and half with placebo. Developmental test scores and hematologic status were evaluated before treatment, after 3 months, and after 6 months.
Results:
Iron-deficient anemic infants received lower mental test scores than nonanemic infants at all three time points (p < 0.05 pretreatment and at 3 months, p = 0.07 at 6 months). There were no significant differences in motor test scores. More of the anemic infants were rated as unusually tearful and unhappy. Anemic infants came from families with lower maternal education and less support for child development and were less likely to be breast fed, were weaned earlier, and consumed more cow milk.
Conclusions:
Lower mental test scores persisted in infants with iron-deficiency anemia despite extended oral iron therapy and an excellent hematologic response. Iron-deficiency anemia may serve as a marker for a variety of nutritional and family disadvantages that may adversely affect infant development.
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