The Combination of Seven Preoperative Markers for Predicting Patients with Gastric Cancer to Be Either Stage IV or Non-Stage IV

Table 4

The result of cross validation by using 7 variables.

Category			Groups prediction		Total
			Stage IV	Non-stage IV
Original	Counting	Stage IV	53	46	99
		Non-stage IV	1	400	401
	%	Stage IV	53.5	46.5	100
		Non-stage IV	0.2	99.8	100
Cross validation	Counting	Stage IV	53	46	99
		Non-stage IV	1	400	401
	%	Stage IV	53.5	46.5	100
		Non-stage IV	0.2	99.8	100

Cross validation is done only for those cases in the analysis. In cross validation, each case is classified by the functions derived from all cases other than that case. 90.6% of the original grouped cases were correctly classified. 90.6% of the cross-validated grouped cases were correctly classified.