Figure 2From: Classification of chronic cough by systematic treatment cascade trial starting with beta agonistChanges in flow volume parameters before and after β 2 agonist inhalation. PEFR, FEFR50% and FEFR25% stand for peak expiratory flow rate, forced expiratory flow rate at 50% of vital capacity and forced expiratory flow rate at 25% of vital capacity, respectively. * P < 0.05.Back to article page