background: peak expiratory flow rate (pefr) is recommended as a tool for control of asthma. the purpose of this study was to determine the normal value of pefr in the healthy high school children in babol, iran. methods: this study was conducted on 470 healthy high school children (285 girls, 185 boys with the age between 14-18 years). for the determination of pefr we used mini wright peak flo...
