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Does lung function in preschoolers help to predict asthma in later life?
Louisa Owens1,2, Peter N Le Souëf3,4,5
1Department of Respiratory Medicine, Sydney Children's Hospital, Randwick, New South Wales, Australia.
Insights
Early respiratory function tests in infancy predict adult lung health and asthma risk. While preschool lung function also correlates with asthma, practical testing challenges limit its clinical use.
Area of Science:
- Pediatric Pulmonology
- Respiratory Medicine
- Asthma Research
Background:
- Early respiratory function assessments correlate with adult lung function and asthma development.
- Infant lung function reflects prenatal development, with minimal postnatal environmental influence.
- Fetal exposures, like maternal smoking, reduce lung function and increase asthma risk, especially in females with specific genetic factors.
Purpose of the Study:
- To examine the predictive value of early respiratory function measurements for later asthma development.
- To understand the interplay between in utero exposures, early lung function, and adult respiratory health.
- To assess the utility of preschool lung function testing as a clinical predictor for asthma.
Main Methods:
- Analysis of respiratory function assessments conducted in infancy and preschool years.
- Correlation of early lung function data with long-term outcomes, including asthma diagnosis.
- Evaluation of environmental and genetic factors influencing lung development and asthma risk.
Main Results:
- Earliest respiratory function assessments show consistent correlations with adult lung function and asthma.
- Maternal smoking during pregnancy is linked to reduced lung function and higher asthma risk in females, particularly those with certain genotypes.
- Preschool lung function measurements are associated with later asthma development.
Conclusions:
- Early lung function measurements are valuable indicators of future respiratory health and asthma risk.
- Despite predictive value, practical challenges in testing preschoolers hinder widespread clinical adoption for asthma prediction.
- Further research may explore methods to overcome testing limitations for improved early asthma detection.
Abstract:
The earliest respiratory function assessments, within or close to the neonatal period, consistently show correlations with lung function and with the development of asthma into adulthood. Measurements of lung function in infancy reflect the in utero period of lung development, and if early enough, show little influence of postnatal environmental exposures. Later in the preschool and school age periods, influences of the environment are superimposed on initial levels. Fetal exposures before birth such as maternal smoking during pregnancy, lead to reduced lung function and an increased risk of asthma in females particularly those with certain glutathione S-transferase genotypes. Lung function measurements later in the preschool period are also associated with development of asthma. Although lung function in preschoolers does help predict asthma in later life and these observations have increased our understanding of the physiology underlying asthma, the findings have not led to thewidespread use of lung function measurements being in preschoolers as clinical predictors of asthma due to the practicalities of testing in this age group.
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