作者:IpSau; Man; Maryseverity专题内容normalityestablishingexacerbationgradingdefiningarbitraryimpaireddistinguish
摘要:专题内容:Spirometry is required for establishing a diagnosis of COPD.In most guidelines,the threshold lungfunction values for defining normality and for grading the severity of GOPD are based on arbitrary cut-offs,most often a fixed percentage of the predicted normal mean.In particular,epidemiologic studies will revealmostly
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