Letter to the editor in response to Hoskote “Corrected formula for rectangular area ratio (RAR), a parameter used to quantify airflow limitation on expiratory flow-volume curves” Respiratory Medicine 2022; 204: 107032

In 2010 we published original research in Respiratory Medicine that used the Rectangular Area Ratio (RAR) of the spontaneous expiratory flow-volume curve to characterize the dynamic development of concavity during ramp-incremental exercise in COPD patients [1]. Development of concavity, as identified by an RAR
Source: Respiratory Medicine - Category: Respiratory Medicine Authors: Tags: Correspondence Source Type: research