Figure 3
From: Epidemiology, genetics, and subtyping of preserved ratio impaired spirometry (PRISm) in COPDGene
Results of k-means clustering in fixed-threshold defined P reserved R atio I mpaired S pirometry (PRISm) in non-Hispanic whites. Legend: Unsupervised k-means clustering was performed in non-Hispanic white subjects with PRISm. The first two principal components generated using the scaled 6 key input variables used for clustering (body mass index, FEV1%, predicted, FEV1/FVC ratio, percent emphysema, total lung capacity, and segmental wall area) are plotted on the x- and y-axes respectively.