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Peak expiratory flow rate in healthy children aged 6-17 years
Insights
Peak expiratory flow rate (PEFR) in children is strongly linked to height, age, and sex. Recurrent wheezing episodes in healthy children were associated with significantly lower PEFR.
Area of Science:
- Pediatric Pulmonology
- Respiratory Physiology
Background:
- Peak expiratory flow rate (PEFR) is a key indicator of lung function.
- Establishing normative data for PEFR is crucial for diagnosing respiratory conditions in children.
Purpose of the Study:
- To establish predictive equations for PEFR in healthy Danish schoolchildren.
- To investigate the relationship between PEFR and anthropometric factors (height, age, sex).
- To assess the impact of prior wheezing episodes on PEFR in healthy children.
Main Methods:
- Cross-sectional study involving 861 healthy Danish schoolchildren aged 6-17 years.
- PEFR measurements were taken using a Mini Wright peak flowmeter.
- Statistical analysis was performed to determine correlations and derive predictive equations.
Main Results:
- A strong correlation was observed between PEFR and height, age, and sex.
- Predictive equations were developed: Boys: PEFR = (3.8 x height) + (10.6 x age) - 313.2 (r=0.8). Girls: PEFR = (2.2 x height) + (14.2 x age) - 143.9 (r=0.64).
- Children with a history of recurrent wheezing (8.8%) exhibited significantly lower PEFR compared to those without.
Conclusions:
- The derived PEFR prediction equations are reliable for healthy Danish schoolchildren.
- History of recurrent wheezing may indicate underlying respiratory compromise even in otherwise healthy children.
- These findings contribute valuable reference data for pediatric respiratory health assessments.
Abstract:
Peak expiratory flow rate (PEFR) was measured in a cross-sectional study in 861 healthy Danish schoolchildren aged 6-17 years using a Mini Wright peak flowmeter. We found a strong correlation between PEFR and height, age and sex. The results were comparable with those from previous studies using a Wright peak flowmeter. The equation for prediction of PEFR in boys was calculated as (3.8 x height) + (10.6 x age) - 313.2 (p < 0.0001, r = 0.8), and for girls, PEFR = (2.2 x height) + (14.2 x age) - 143.9 (p < 0.0001, r = 0.64). Our results appear to be reliable, as evidenced by the high correlation coefficient in this large sample. Among healthy children without previous asthma, earlier episodes of recurrent wheezing were reported in 8.8% and a significantly lower PEFR was found in this group.