TABLE 6.

Result of Kaplan–Meier and ROC analysis based on different regrouping methods.

Regrouping factors	Group	Sample size	Kaplan-Meier	ROC
			P-value	AUC	95% CI	P-value
Age (years)
	≤40	87	0.008	0.714	0.490–0.937	0.110
	41–60	446	0.007	0.652	0.532–0.771	0.025
	≥61	429	0.000	0.757	0.670–0.844	0.000
Subtype (PAM50)
	LumA	456	0.000	0.716	0.553–0.878	0.008
	LumB	164	0.113	0.67	0.574–0.765	0.197
	HER2	67	0.067	0.279	0.000–0.654	0.140
	Basal	157	0.001	0.666	0.553–0.779	0.026
	Normal	118	0.000	0.817	0.693–0.941	0.001
Tumor size
	T1	248	0.005	0.744	0.608–0.880	0.009
	T2	560	0.000	0.714	0.614–0.814	0.001
	T3	126	0.000	0.813	0.685–0.940	0.003
	T4	28	0.506	0.583	0.358–0.809	0.472
Lymph node status
	N0	466	0.002	0.689	0.562–0.816	0.020
	N1	324	0.000	0.704	0.576–0.832	0.002
	N2	107	0.029	0.752	0.629–0.875	0.013
	N3	65	0.013	0.806	0.663–0.950	0.009
Metastasis status
	M0	948	0.000	0.733	0.661–0.805	0.000