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Infancy: mental and motor development
1Instituto de Nutrición y Tecnología de los Alimentos, Universidad de Chile, Santiago.
Insights
Iron deficiency anemia in infants significantly impacts psychomotor development, leading to lower cognitive and motor scores. Early iron supplementation did not reverse these developmental deficits in the short or long term.
Area of Science:
- Pediatric Nutrition
- Developmental Pediatrics
- Hematology
Background:
- Iron deficiency is common in infants and can affect development.
- Understanding the impact of iron status on early psychomotor development is crucial for timely interventions.
Purpose of the Study:
- To investigate the relationship between iron status and psychomotor development in infants.
- To evaluate the efficacy of short-term and long-term oral iron therapy on developmental outcomes in anemic infants.
Main Methods:
- Prospective cohort study involving 196 infants from birth to 15 months.
- Developmental assessment using the Bayley Scale of Infant Development.
- Categorization of infants into anemic, nonanemic iron-deficient, and control groups.
Main Results:
- Anemic infants exhibited significantly lower psychomotor development indices compared to control or nonanemic iron-deficient infants.
- Nonanemic iron-deficient infants performed comparably to control infants.
- Neither short-term (10 days) nor longer-term (3 months) oral iron therapy showed significant improvement in developmental scores.
Conclusions:
- Iron deficiency progressing to anemia is associated with persistent adverse effects on infant motor and mental development.
- These developmental deficits may not be reversible with iron therapy once anemia is established and prolonged (duration >3 months).
Abstract:
In a prospective cohort study of 196 infants from birth to age 15 mo, the relationship of iron status to psychomotor development, the effect of a short-term trial of oral iron or placebo, and the effect of longer-term oral iron therapy was assessed. Development was assessed with the Bayley Scale of Infant Development in anemic, nonanemic, iron-deficient, and control children. Anemic infants had significantly lower indices than did control or nonanemic, iron-deficient infants. Control infants and nonanemic, iron-deficient infants performed comparably. No difference between the effect of oral administration of iron or placebo was noted after 10 d or 3 mo of iron therapy. A hemoglobin concentration of less than 105 g/L and anemia duration greater than 3 mo were correlated with significantly lower motor and mental scores, suggesting that when iron deficiency progresses to anemia, adverse influences in the performance of developmental tests appear and persist, despite iron therapy.