TABLE 4.

Demographic, clinical, and pathologic characteristics of the patient with breast cancer.

Variable	All dataset					Validation dataset
	Total	Risk group		χ2	P-value	Total	Risk group		χ2	P-value
		Lower	Higher				Lower	Higher
	n = 962	n = 624	n = 338			n = 481	321	160
Age (years)
≤40	87	59	28	0.545	0.762	44	31	13	0.322	0.851
41–60	446	285	161			228	152	76
≥61	429	280	149			209	138	71
Subtype (PAM50)
LumA	456	353	103	92.295	0.000	240	186	54	45.400	0.000
LumB	164	90	74			70	41	29
HER2	67	19	48			33	11	22
Basal	157	80	77			85	42	43
Normal	118	82	36			53	41	12
Tumor size
T1	248	183	65	18.447	0.000	136	98	38	2.484	0.478
T2	560	340	220			274	178	96
T3	126	88	38			60	38	22
T4	28	13	15			11	7	4
Lymph node status
N0	466	299	167	2.551	0.466	253	165	88	1.756	0.624
N1	324	207	117			154	102	52
N2	107	70	37			45	32	13
N3	65	48	17			29	22	7
Metastasis status
M0	948	616	332	0.372	0.542	472	315	157	0.000	0.996
M1	14	8	6			9	6	3