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Fig. 2 | Respiratory Research

Fig. 2

From: Reliability, validity and responsiveness of E-RS:COPD in patients with spirometric asthma-COPD overlap

Fig. 2

Mean (SD) known groups validity of E-RS Total and domain scores and wheeze item at the baseline week. The baseline week was defined as the last week of run-in (Day − 7 to Day − 1). *p < 0.05; **p < 0.01; ***p < 0.001; Error bars show standard deviations. COPD, chronic obstructive pulmonary disease; E-RS, Evaluating Respiratory Symptoms in COPD; FEV1, forced expiratory volume in 1 s; mMRC, Modified Medical Research Council; SD, standard deviation

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