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[Usefulness of forced expiratory flow rate measurements in diagnosis of selected lung diseases in children].

The study group was composed of 2512 healthy children (age range 7-15 years) randomly selected from schools of the Upper Silesian Industrial District. In each child 5 PEF measurements were carried out using the Vitalograph meter. A statistical analysis of the results was carried out. The results seen in tables and centile charts can be used as normal values for children in given age groups and sex. PEF is useful in clinical diagnosis of different respiratory diseases.