Figure 1From: Differences in classification of COPD group using COPD assessment test (CAT) or modified Medical Research Council (mMRC) dyspnea scores: a cross-sectional analyses Consort diagram of the study participants. * Airflow obstruction was defined according to the GOLD criteria: a postbronchodilator FEV1/FVC (forced expiratory volume in 1s/forced vital capacity) ratio < 0.70.Back to article page