Figure 2

Survival curves of patients with either IIPs or IPF with or without IgG1-positive cell infiltration. (a) The Kaplan–Meier curve of the overall survival of patients with idiopathic interstitial pneumonias with or without IgG1-positive cell infiltration in the lungs (IgG1-positive or negative IIPs). (Solid line: IgG1-positive IIPs, Broken line: IgG1-negative IIPs). (b) The Kaplan–Meier curve of the overall survival of patients with idiopathic pulmonary fibrosis with or without IgG1-positive cell infiltration in the lungs (IgG1-positive or negative IPF). (Solid line: IgG1-positive IPF, Broken line: IgG1-negative IPF). CI confidence interval, Ig immunoglobulin, IIP idiopathic interstitial pneumonia, IPF idiopathic pulmonary fibrosis, N.E. not evaluable, OS overall survival.