Table 2. Performance of different feature combinations for disease detection and quantification.

Groups	Accuracy			Destination	Method
	SI*	DI*	SI* + DI*
N vs. P	98.31	86.44	89.83	Disease detection	C-SVM
P1 vs. P2&P3	73.91	91.30	91.30	Disease quantification

N: normal samples; P: CHF patients, in which 1 is of NYHA I-II, 2 is of NYHA III, 3 is of NYHA III-IV; SI: static indices; DI: dynamic indices;

* represents that significance level of features were under 0.1; C-SVM: classical SVM.