Differences of Excess and Deficiency Zheng in Patients with Chronic Hepatitis B by Urinary Metabonomics

Table 2

Automatic modeling parameters for the classification of EZ and DZ.

Model	Amount of components	𝑅^2𝑋	𝑅^2𝑌	𝑄^2𝑌
PCA-X	1	0.111		0.0165
PLS-DA	1	0.0592	0.507	0.0723
OPLS	1	0.0592	0.508	0.0688

𝑅²𝑋_cum and 𝑅²𝑌_cum represent the cumulative sum of squares (SS) of all the 𝑋’s and 𝑌’s explained by all extracted components.
𝑄²𝑌_cum is an estimate of how well the model predicts the 𝑌’s.