Table 5.

Comparisons of FWU model with baseline and intermediate models for predicting survival outcomes using C-index and iAUC

Model comparison	Model	C-index (SE)	iAUC (SE)	P value (C-index)	P value (iAUC)
FWU vs Baseline	FWU	0.815 (0.017)	0.775 (0.016)	<.001	<.001
	Baseline	0.664 (0.020)	0.646 (0.010)
FWU vs Intermediate	FWU	0.815 (0.017)	0.775 (0.016)	.010	.002
	Intermediate	0.799 (0.019)	0.761 (0.017)

The FWU model incorporates sex, American Society of Anesthesiologists Physical Status, stage, vascular invasion, type of gastrectomy, hemoglobin level, serum albumin level, and FWU BMR. The intermediate model incorporated the same covariates as the FWU model, except for the FWU BMR. The baseline model relied solely on the stage.

C-index = concordance index, FWU = the Food and Agriculture Organization/World Health Organization/United Nations University, iAUC = integrated area under the curve, SE = standard error.