Table 2.

NRI and IDI of the nomogram and the traditional AJCC staging system in OS prediction for YBC patients

		NRI		IDI
		3-Year	5-Year	3-Year	5-Year
Training cohort (n = 8166)
Estimate		0.257	0.190	0.086	0.085
95% CI		0.208–0.345	0.124–0.237	0.068–0.109	0.070–0.105
P value				< 0.001	< 0.001
Internal validation cohort (n = 3500)
Estimate		0.257	0.220	0.092	0.090
95% CI		0.192–0.342	0.121–0.306	0.067–0.131	0.066–0.123
P value				< 0.001	< 0.001
External validation cohort (n = 351)
Estimate		0.140	0.131	0.079	0.105
95% CI		0.008–0.453	0.058–0.533	0.026–0.211	0.047–0.248
P value				< 0.001	< 0.001