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Updated: Jun 29, 2026

Breath Collection from Children for Disease Biomarker Discovery
Published on: February 14, 2019
Prevalence of mouth breathing among children
Rubens Rafael Abreu1, Regina Lunardi Rocha, Joel Alves Lamounier
1Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil. rubensabreu@abaetenet.psi.br
Insights
This study found that 55% of children aged 3 to 9 in Abaeté, Brazil, were mouth breathers. Further research is needed to develop better diagnostic tools for primary care.
Area of Science:
- Pediatric Health
- Respiratory Medicine
- Public Health
Background:
- Mouth breathing in children can lead to various health issues.
- Accurate prevalence data is crucial for understanding the scope of the problem.
- Validated diagnostic tools are lacking for primary care settings.
Purpose of the Study:
- To determine the prevalence of mouth breathing in children aged 3 to 9 years.
- To assess children residing in the urban districts of Abaeté, Minas Gerais, Brazil.
Main Methods:
- A representative, randomized sample of 370 children was selected.
- A custom-developed protocol for anamnesis and clinical assessment was used.
- Data analysis was performed using SPSS version 10.5.
Main Results:
- The prevalence of mouth breathing was found to be 55%.
- This equates to 204 children in the studied population.
Conclusions:
- A high prevalence of mouth breathing was observed in the study population.
- Further research is necessary to validate a questionnaire for clinical diagnosis.
- Development of reliable tools is needed for primary care settings.
Objective:
To determine the prevalence of mouth breathing among children aged 3 to 9 years living in the urban districts of the town of Abaeté, MG, Brazil.
Methods:
This study assesses a representative, randomized sample of the town's population (23,596 inhabitants). Children were selected by lots according to a random number table until 370 had been enrolled; this number had been determined by statistical calculation. A protocol for anamnesis and clinical assessment of the patients was specially developed for this project, since no preexisting instruments could be found in the literature that had been validated and were appropriate for the purpose. Data were analyzed using SPSS version 10.5.
Results:
The prevalence of mouth breathing was found to be 55%, or 204 children.
Conclusion:
Further studies are needed to validate a questionnaire for the clinical diagnosis of mouth breathers at the primary care level.
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