Etiology and functional status of liver cirrhosis by 31P MR spectroscopy

Figure 3 Results of principal component analysis (CPS). Individual positions of spectra displayed on the PCA scatterplots. Principal components are standardized (centered and scaled to unit variance). Principal component 1 explains 47 % of total variance, principal component explains 3 16% of total variance. (A) Patients with only alcoholic etiology and controls; (B) patients with only viral etiology and controls. Child-Pugh score subgroups (A, B, and C) and controls are bounded. (C) Projection of the principal component loadings on the planes 1 and 3.