Fig. 3From: The impact of respiratory reactance in oscillometry on survival in patients with idiopathic pulmonary fibrosisThe Kaplan–Meier curves dividing patients with each optimized cutoff values of the respiratory reactance index. X5 In (a), Fres In (b), and ALX In (c). ALX, low-frequency reactance area; Fres, resonant frequency; In, inspiratory phase; X5, reactance at 5 HzBack to article page