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Updated: Jul 14, 2026

A Point-of-Care Method with Integrated Decision Support Tool to Estimate Anemia at Population Level
Published on: January 19, 2024
[Anemia in children under six: population-based study in Pelotas, Southern Brazil]
Maria Cecília Formoso Assunção1, Iná da Silva dos Santos, Aluísio Jardim Dornellas de Barros
1Faculdade de Nutrição, Universidade Federal de Pelotas, Pelotas, RS, Brasil.
Insights
Anemia affects 30.2% of children under six in urban Brazil, primarily linked to age and family income. Targeted interventions for disadvantaged populations are crucial to reduce childhood anemia.
Area of Science:
- Pediatric Nutrition
- Public Health Epidemiology
Background:
- Childhood anemia is a significant global health concern, particularly in developing urban areas.
- Understanding prevalence and risk factors is vital for effective public health interventions.
Purpose of the Study:
- To determine the prevalence of anemia in children under six years old.
- To identify socioeconomic and demographic factors associated with anemia in this age group.
Main Methods:
- A probabilistic sample of 534 children (0-5 years) in Pelotas, Brazil, was studied in 2004.
- Data collected included demographics, socioeconomic status, anthropometry, and morbidity.
- Anemia was defined as hemoglobin <11 g/dL, measured using a HemoCue hemoglobinometer.
Main Results:
- The overall prevalence of anemia was 30.2% (95% CI 23.5%; 37.0%).
- Multivariate analysis revealed significant associations between anemia and child's age and family income.
- Losses and refusals were minimal at 5.1%.
Conclusions:
- Childhood anemia in the studied urban population is strongly influenced by social determinants.
- Interventions should prioritize disadvantaged populations to achieve short-term reductions in anemia prevalence.
Objective:
To assess the prevalence of anemia among children under six years of age in a probabilistic sample from an urban area.
Methods:
A study was conducted comprising children aged zero to five years in the city of Pelotas, Southern Brazil, in 2004. Data were collected on demographic, socioeconomic, and anthropometric characteristics, morbidity and nutrition using a questionnaire applied to the mothers and guardians. Children's weight and height measurements were obtained. Hemoglobin concentration was measured using the HemoCue portable hemoglobinometer and anemia was defined as hemoglobin <11 g/dL. The association between anemia and predictors was expressed as prevalence ratio. Multivariate analysis was carried out using Poisson regression following a conceptual model and taking into account the study design effect.
Results:
There were identified 534 children and total losses and refusals were 27 (5.1%). The prevalence of anemia was 30.2% (95% CI 23.5%; 37.0%). In the multivariate analysis, only age and family income remained significantly associated with anemia.
Conclusions:
Anemia was largely socially determined in the population studied. Interventions aiming at reducing anemia should be developed to lessen this condition in the short run targeting disadvantaged populations.
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