Reference values for the peak expiratory flow

Peak expiratory flow (PEF) is an important screening method for investigation and follow-up of the pulmonary function. Since reading the obtained PEF results requires reference values, the aim of this study was to establish normal values for PEF in our adolescent population. The investigation included 1154 healthy teenagers aged from 15 to 19 years using a peak flow meter Harlow, Essex CM 2ED. Detailed explanations, purpose of investigation and function demonstrations were done prior to testing. Results were statistically analyzed. Obtained results showed an increase of PEF values with age and body height in both sexes. Elevation of PEF was more significant in boys; high correlation was found in regard to age and height in boys and moderate correlation in girls. Regression equations for sex, age and height were made after measurements and data analysis. PEF values can be easily calculated knowing one's age and height.