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Published on: August 18, 2015
Association between iron-deficiency anemia and stroke in young children
Jonathon L Maguire1, Gabrielle deVeber, Patricia C Parkin
1Department of Pediatrics and the Pediatric Outcomes Research Team, University of Toronto Faculty of Medicine, Toronto, Ontario, Canada M5G 1X8.
Insights
Iron-deficiency anemia is a significant risk factor for stroke in young children. Early identification and prevention of iron-deficiency anemia are crucial for preventing strokes in otherwise healthy children.
Area of Science:
- Pediatric Neurology
- Hematology
Background:
- Iron-deficiency anemia is common in children aged 1-3 years.
- Previous reports suggest a link between iron-deficiency anemia and ischemic stroke in healthy children.
Purpose of the Study:
- To investigate the association between iron-deficiency anemia and stroke in young children.
Main Methods:
- A case-control study compared 15 children with stroke to 143 healthy controls.
- Data collected included hemoglobin, ferritin, and mean corpuscular volume levels.
- Iron-deficiency anemia was defined by specific hemoglobin, mean corpuscular volume, and ferritin thresholds.
Main Results:
- Iron-deficiency anemia was diagnosed in 53% of children with stroke versus 9% of controls.
- Children with stroke had lower hemoglobin and mean corpuscular volume, and higher platelet counts.
- A 10-fold increased likelihood of iron-deficiency anemia was observed in children with stroke.
Conclusions:
- Iron-deficiency anemia is a significant risk factor for stroke in otherwise healthy young children.
- Over half of stroke cases in healthy children were linked to iron-deficiency anemia.
- Prioritizing primary prevention and early detection of iron-deficiency anemia is essential.
Objective:
Iron-deficiency anemia occurs with a peak prevalence of 4% to 8% in children between 1 and 3 years of age. Case reports have suggested an association between iron-deficiency anemia in healthy children and ischemic stroke. Our objective was to investigate whether iron-deficiency anemia is associated with stroke in young children.
Methods:
A case-control study was conducted of case patients who were selected from the stroke registry at the Hospital for Sick Children (Toronto, Ontario, Canada) and control subjects selected from a database of healthy children who were prospectively enrolled in an outpatient setting. Children were aged 12 to 38 months and were previously healthy with no identifiable risk factors for stroke. Age, gender, mean corpuscular volume, platelet count, and hemoglobin and ferritin levels were collected. Iron-deficiency anemia was defined as a hemoglobin level of <110 g/L, mean corpuscular volume <73 fL, and serum ferritin level <12 microg/L. Stroke was defined according to clinical and radiologic criteria.
Results:
Case (n = 15) and control (n = 143) subjects were similar with respect to median age and percentage of boys. Case patients had a lower median hemoglobin level and mean corpuscular volume and a higher median platelet count. Iron-deficiency anemia was significantly more common among case patients (8 [53%] of 15) than control subjects (13 [9%] of 143).
Conclusions:
Previously healthy children with stroke were 10 times more likely to have iron-deficiency anemia than healthy children without stroke. Furthermore, children with iron-deficiency anemia accounted for more than half of all stroke cases in children without an underlying medical illness, which suggests that iron-deficiency anemia is a significant risk factor for stroke in otherwise healthy young children. Primary prevention and early identification of iron-deficiency anemia must remain a priority.
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