Peak expiratory flow rate and its correlation with height among 6 to 14 years children: a cross sectional study

A. Gunasekaran


Background: The objective of this research was to study the peak expiratory flow rate (PEFR) values and its correlation with height in children aged between 6 to 14 years and height.

Methods: A cross sectional study was conducted among 1205 children aged 6 to 14 years in department of paediatrics at a medical college hospital. In a pre-structured questionnaire, the age, sex, height and PEFR values were recorded. PEFR was considered as primary outcome variable. SPSS version 20 was used for data analysis.

Results: Among 1205 study participants, height showed a steady relationship with PEFR. As height increases PEFR increases progressively in both boys and girls. (R2=0.691). The linear regression model for PEFR with height of all age shows, one centimeter increase in height there was 5.1% increase in PEFR with a constant (-458.0) and a 95% confidence interval 4.9 to 5.3, a lesser R2=69.1% which was found to be statistically significant.

Conclusions: The PEFR values derived and its height correlation in this study can be used as reference for children in and around Chennai district.


Pulmonary function tests, Children, Peak flow rates, Age, Sex

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