Asthma Diagnostic Tools: 323 Annual Change of Peak Expiratory Flow Rate in Asthma and COPD

摘要

BackgroundPeak Expiratory Flow Rate (PEFR) is a useful measurement for the follow-up examination in a chronic airway disease because it has the advantage of simple measuring and repetitive examination. The aim of this study is to examine the annual decrease of PEFR in asthma and COPD patients and to confirm the factors which influence the annual decreasing rate of PEFR.