Table 6.

Improvement in survival outcome predictions at specific time points using cNRI

Model comparison	Metrics (mo)	Difference (95% CI)	P value
FWU vs Baseline	cNRI (36)	0.317 (0.190; 0.449)	<.001
	cNRI (60)	0.328 (0.227; 0.440)	<.001
FWU vs Intermediate	cNRI (36)	0.221 (0.002; 0.326)	.048
	cNRI (60)	0.272 (0.040; 0.377)	.032

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.

CI = confidence interval, cNRI = continuous net reclassification improvement, FWU = the Food and Agriculture Organization/World Health Organization/United Nations University.