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Updated: Jun 6, 2026

A Point-of-Care Method with Integrated Decision Support Tool to Estimate Anemia at Population Level
Published on: January 19, 2024
Prevalence of anemia among preschoolers and response to iron supplementation
Juliana T Costa1, Mario M Bracco, Paulo A P Gomes
1Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Sergipe, Aracaju, SE, Brazil. julitcosta@gmail.com
Insights
Anemia affected 25.6% of preschool children in Brazil. Prompt treatment and school-based screening significantly improved hemoglobin levels and recovery rates, addressing a key public health concern.
Area of Science:
- Pediatric Public Health
- Nutritional Epidemiology
Background:
- Anemia is a significant public health issue affecting children globally.
- Preschool-aged children are particularly vulnerable to nutritional deficiencies, including iron deficiency anemia.
Purpose of the Study:
- To determine the prevalence of anemia in preschool children in Ilhabela, Brazil.
- To evaluate the effectiveness of a ferrous sulfate treatment regimen in anemic children.
Main Methods:
- A cross-sectional study involving 667 preschool children in Ilhabela, Brazil.
- Hemoglobin levels were measured, and anemic children received a 12-week ferrous sulfate treatment with follow-up assessments.
Main Results:
- The prevalence of anemia was 25.6% (170 children).
- Anemia was most common in children aged 60-65 months (36%).
- Treatment increased median hemoglobin from 10.5 g/dL to 11.8 g/dL, with 76% recovery.
Conclusions:
- School-based anemia screening and prompt treatment are effective public health strategies.
- Mid-treatment follow-up enhances therapeutic outcomes.
- This approach successfully addressed a major public health challenge in the studied population.
Objectives:
To assess the prevalence of anemia among children attending public preschools in Ilhabela, state of São Paulo, Brazil, and their response to a treatment regimen.
Methods:
Between 2007 and 2008, the weight, height, and hemoglobin levels of 667 children were measured in the school setting. Anemic children were prescribed a 12-week course of ferrous sulfate, and follow-up assessment visits were scheduled for halfway through this course and the end of treatment.
Results:
The prevalence of anemia was 25.6% (N = 170). The lowest hemoglobin level measured was 9.5 g/dL. Anemia was most prevalent (36%) in children between the ages of 60 and 65 months. Median hemoglobin levels rose to 11.8 g/dL from 10.5 g/dL after treatment; 76% of children recovered from anemia.
Conclusion:
Screening for anemia in the school setting and prompt therapy, including mid-treatment follow-up, proved to be an effective strategy for facing this major public health issue.
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