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Factors affecting the peak expiratory flow rate in children
British Journal of Diseases of the Chest
|January 1, 1984
Summary
Peak expiratory flow rate (PEFR) in children strongly correlates with height. Age also significantly impacts PEFR, independent of height, requiring consideration in population studies for accurate predictions.
Area of Science:
- Pediatric Pulmonology
- Respiratory Physiology
- Child Health Research
Background:
- Peak expiratory flow rate (PEFR) is a key indicator of lung function in children.
- Understanding factors influencing PEFR is crucial for accurate health assessments and population studies.
Purpose of the Study:
- To investigate the relationship between standing height and PEFR in British schoolchildren.
- To determine the influence of age, sex, and medical history on PEFR.
- To examine age-specific effects on PEFR independent of height.
Main Methods:
- Measured standing height and PEFR in 339 British schoolchildren (aged 7-16).
- Collected data on personal/family history of respiratory conditions and recent illnesses.
- Analyzed data using regression analysis, considering age, sex, and height.
Main Results:
- A strong positive correlation was found between PEFR and height (r = 0.89).
- Neither sex nor history of wheeze, atopy, or recent cold significantly affected the PEFR-height relationship.
- Age demonstrated an independent effect on PEFR, with linear effects in girls and curvilinear effects in boys, consistent with Greek schoolchildren data.
Conclusions:
- Height is a primary determinant of PEFR in children.
- Age exerts a significant, independent influence on PEFR, varying by sex.
- Population studies of PEFR must account for age distribution within height intervals to avoid prediction errors, especially in pubertal boys.