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

Figure 4 Results of principal component analysis (etiology). (A) Individual positions of spectra of patients with CPS-B and C together with a control group are displayed on the PCA plot. Etiological groups (alcoholic, viral and cholestatic) and controls are bounded. Principal component 1 explains 46 % of total variance, principal component 3 explains 17% of total variance; (B) Projection of the principal component loadings on the planes 1 and 3.