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. 2017 Sep 28;153(2):349–360. doi: 10.1016/j.chest.2017.09.026

Figure 2.

Figure 2

Longitudinal change (Δ) in percent predicted FVC in patients with chronic ILD over 12 months. (A) When classifying patients according to clinical ILD entity, FVCΔ did not differ between IPF and CHP (P = .215) or between CTD-ILD and IPAF (P = .953). (B) When classifying patients according to phenotypic clusters, FVC Δ did not differ between Clusters 1 and 3 (P = .852); however, FVCΔ was significantly different between Clusters 2 and 4 (P < .0001). Time 0 = initial ILD classification. CHP = chronic hypersensitivity pneumonitis; CTD-ILD = connective tissue disease-associated interstitial lung disease; ILD = interstitial lung disease; IPAF = interstitial pneumonia with autoimmune features; IPF = idiopathic pulmonary fibrosis; PFT = pulmonary function test.