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Published models and local data can bridge the gap between reference values of lung function for children and adults
1The Juliane Marie Centre for Children, Women, and Reproduction, The National University Hospital, Rigshospitalet, Copenhagen, Denmark.
The European Respiratory Journal
|July 1, 1997
Summary
This study developed customized pulmonary function test (PFT) reference equations for adolescents and young adults. These new equations improve the accuracy of PFT analysis in clinical settings.
Area of Science:
- Pulmonary Medicine
- Pediatric Pulmonology
- Clinical Physiology
Background:
- Accurate pulmonary function test (PFT) reference equations are crucial for diagnosing respiratory conditions in adolescents and young adults.
- Existing PFT reference equations often perform poorly in the 13-24 year age range, failing to account for developmental changes.
- A need exists for localized, accurate PFT reference equations for specific populations.
Purpose of the Study:
- To create and validate customized reference equations for key pulmonary function tests (PFTs) across the pediatric to young adult age spectrum (13-24 years).
- To compare existing PFT reference equations against a local cohort of healthy young Caucasians to identify deficiencies.
- To establish the best available PFT reference equations for clinical use in a specific laboratory setting.
Main Methods:
- Collected PFT data (FVC, FEV1, FEV1/FVC, TLC, transfer factor) from 348 healthy, never-smoking Caucasian individuals aged 13-24 years.
- Compared local PFT data against 13 published reference equation sets, evaluating prediction accuracy.
- Selected and adjusted the best-fitting existing equations (ECSC for adults, European/British for younger individuals) to match local data characteristics.
Main Results:
- Significant discrepancies were found between predicted and observed PFT values for 63 out of 92 tested reference equations.
- Most existing equations inadequately captured the increase in PFT variables during adolescence.
- Customized equations demonstrated improved agreement with local population data, enhancing predictive accuracy.
Conclusions:
- Developed customized PFT reference equations tailored for adolescents and young adults (13-24 years) based on local population data.
- The customized equations provide superior accuracy for analyzing PFTs in the studied population compared to existing general equations.
- This methodology offers a viable approach for generating reliable PFT reference equations when standard ones are inadequate and local data is available.