Pulmonary function between 6 and 18 years of age

Area of Science:

• Pediatric Pulmonology
• Growth and Development
• Biostatistics

Background:

• Understanding normal pulmonary function in children is crucial for identifying respiratory abnormalities.
• Existing growth charts may not fully capture the complexities of lung function development during adolescence across different demographics.

Purpose of the Study:

• To establish race- and sex-specific growth curves for key pulmonary function parameters in children aged 6-18 years.
• To develop regression equations for accurate evaluation of longitudinal pulmonary function data in children.

Main Methods:

• Analysis of 82,462 annual pulmonary function measurements (FVC, FEV1, FEF25-75%) from 11,630 white and 989 black children.
• Comparison of median lung function values across race and sex subgroups by age and height.
• Generation of race- and sex-specific percentile distributions and growth curves based on height.

Main Results:

• Boys exhibited higher lung function than girls, and white children showed higher values than black children at similar heights.
• Pulmonary function increased linearly with age until the adolescent growth spurt (around 10 years for girls, 12 for boys).
• The relationship between pulmonary function and height varied with age during adolescence.

Conclusions:

• Race- and sex-specific growth curves of pulmonary function versus height are valuable tools for evaluating individual children's lung function.
• Provided regression equations enable more accurate assessment of adolescent growth and comparison with previous measurements.
• A single growth chart or equation is insufficient for fully describing adolescent lung function development.