Figure 3
From: Responses of FEV6, FVC, and FET to inhaled bronchodilator in the adult general population
The relationship of a) individual changes in forced vital capacity (FVC) after bronchodilation, and b) the difference between the individual changes in forced expiratory volume in six seconds (FEV 6 ) and FVC, to the ratio of forced expiratory volume in one second (FEV 1 ) to FVC at the baseline in general adult population (n = 628). The dotted line indicates the FEV1/FVC limit for airflow obstruction (0.7). In subjects with airflow obstruction, positive FVC bronchodilation response was more common and the difference between FVC and FEV6 responses tended to be larger.