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Small airway function in predicting asthma control in preschool children
Liangqin Yi1,2,3,4, Yan Zhao1,2,3,4, Ziyao Guo1,2,3,4
1Department of Respiratory Medicine Children's Hospital of Chongqing Medical University Chongqing China.
Pediatric Discovery
|July 8, 2025
Summary
Preschool children with asthma showing severe airway hyperresponsiveness (AHR) or reduced forced expiratory flow at 50% (FEF50%) are at higher risk for poor asthma control. Early detection of these factors can help predict short-term asthma outcomes.
Area of Science:
- Pediatric Pulmonology
- Respiratory Medicine
- Asthma Research
Background:
- Asthma control in preschool children presents significant challenges.
- Predicting short-term asthma control is crucial for timely intervention.
- Small airway function may offer insights into asthma control trajectories.
Purpose of the Study:
- To investigate the role of small airway function in predicting asthma control in preschool children.
- To identify risk factors associated with poor asthma control within 2-3 months post-diagnosis.
- To analyze the association between lung function parameters and short-term asthma outcomes.
Main Methods:
- Retrospective cohort study of 219 preschool children diagnosed with asthma.
- Analysis of clinical history and lung function tests including forced expiratory volume in 1 second (FEV1), forced expiratory flows (FEF50%, FEF75%, FEF25-75%), and forced vital capacity (FVC%).
- Multivariable regression modeling to identify predictors of poor asthma control.
Main Results:
- 31.5% of children experienced poor asthma control.
- Severe airway hyperresponsiveness (AHR) and decreased FEF50% were significantly associated with poor short-term asthma control.
- Lower baseline FEV1, FEF50%, FEF75%, and FEF25-75% were observed in the poorly controlled group compared to the well-controlled group.
Conclusions:
- Initial severe AHR and reduced FEF50% are significant predictors of poor asthma control in preschool children.
- Small airway function, particularly FEF50%, plays a key role in predicting short-term asthma control.
- These findings can aid in early risk stratification and management of asthma in young children.
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