Peak expiratory flow rate in normal school children (5-15 Years) of Vizianagaram district- A cross-sectional study

Abstract

Introduction: PEFR is a simple bedside tool to assess the degree of airway obstruction in asthmatic children. As it is influenced by age, anthropometric data, racial and ethnic differences, region specific nomograms have been advocated for use. This study has been undertaken with a view to establish reference values for PEFR and develop nomograms in Vizianagaram district. Material and Methods: The present study was undertaken at MIMS medical college, Vizianagaram. The main aim of this school based, cross-sectional, descriptive study was to establish standard nomograms of PEFR for healthy school going children between 5-15 years age group. A total of 2684 students were included in the study after meeting the inclusion criteria. PEFR values were recorded with mini-Wright peak flow meter. Body surface area and body mass index were calculated from height and weight. Statistical analysis was carried out using R version 3.4.2. Results:PEFR showed high positive correlation with respect to Height, Weight, Age, Body Surface area and moderate positive correlation with BMI. Separate regression models were developed for boys and girls. Conclusions:PEFR had positive correlation with height, age, weight, BMI and BSA.PEFR values of children in Vizianagaram district were lesser than those of other south Indian, north Indian and western children. Keywords: PEFR, mini-Wright peak flow meter, linear regression equations, asthma morbidity, nomograms