Table 2.

10-fold cross-validation results of classification for 411 cases.

CHAID	TN	FP	Sensitivity (%)	Specificity (%)	Accuracy (%)
	FN	TP
Qi deficiency	144	42	70.2%	77.4%	73.5%
	67	158
Phlegm-blood stasis	278	64	72.5%	81.3%	79.8%
	19	50

Note: sensitivity = TP/(TP + FN); specificity = TN/(TN + FP); accuracy = (TP + TN)/(TP + FP + TN + FN).