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Unexpectedly high peak expiratory flow rates in normal Greek children
Insights
Greek children exhibit significantly higher peak expiratory flow rates (PEFR) relative to their standing height (Ht) compared to international norms. This unexpected finding in pediatric pulmonary function warrants further investigation into contributing factors.
Area of Science:
- Pediatric Pulmonology
- Anthropometry
- Comparative Physiology
Background:
- Peak expiratory flow rate (PEFR) is a key indicator of lung function.
- Previous studies established reference values for PEFR based on height (Ht) in various populations.
- Understanding population-specific PEFR variations is crucial for accurate clinical assessment.
Purpose of the Study:
- To establish normative data for PEFR in healthy Greek children.
- To compare PEFR values in Greek children with those of British children and existing international data.
- To investigate potential reasons for observed discrepancies in PEFR between populations.
Main Methods:
- Cross-sectional study involving 522 healthy Greek children (aged 7-16 years).
- Measurement of standing height (Ht) in centimeters and peak expiratory flow rate (PEFR).
- Regression analysis to determine the relationship between PEFR and Ht; comparison with a sample of 339 British children.
Main Results:
- The regression equation for Greek children was PEFR = 5.34 Ht - 380.8.
- Greek children demonstrated markedly higher PEFR values for their height compared to previously published data.
- Regression analysis of British children yielded PEFR = 5.64 Ht - 472.5, aligning with existing literature.
Conclusions:
- Greek children possess unexpectedly high peak expiratory flow rates for their standing height.
- No methodological errors (sampling, measurement, calibration) were identified to explain the discrepancy.
- Further research is needed to elucidate the factors contributing to the elevated PEFR in this pediatric population.
Abstract:
Peak expiratory flow rate (PEFR) and standing height (Ht) were measured in 522 healthy Greek children aged 7-16 years. The regression equation of PEFR on height in centimetres was PEFR = 5.34 Ht--380.8. This demonstrated markedly higher values for PEFR in Greek children compared to previously published data from other countries. A sample of 339 British children was examined similarly. The regression equation of PEFR on height in centimetres was PEFR = 5.64 Ht--472.5. This was similar to previously published data. No cause for this discrepancy was found after close examination of population sampling, measurement error or calibration error in the Greek study. It is therefore concluded that Greek children appear to have an unexpectedly high PEFR for height.