Table 3. Stratification analysis of Oct-4 and Nanog expression in 126 breast cancer samples.

Factors	N	Oct+	Nan+	Nan/Oct+	Nan/Oct−	P1	P2	P3
Age
< 35 Y	18	4	8	2	8	0.062	0.499	0.281
> 35 Y	108	48	39	24	45
Tumor size	24	8	2	0	14	0.562	0.005	0.016
T1
T2	83	37	36	20	30
T3	19	7	9	6	9
Histological grade
I	15	1	2	0	12	0.001	0.001	0.001
II	57	12	10	4	39
III	54	39	35	22	2
Clinical stage
DCIS	16	9	8	1	0	0.151	0.280	0.189
IDC	110	43	39	25	53
Lymph node metastasis
pN0	50	12	9	2	31	0.006	0.001	0.001
pN1	44	20	15	6	15
pN2	27	17	19	15	6
pN3	5	3	4	3	1
Molecular type
Luminal A	69	20	20	6	35	0.001	0.005	0.001
Luminal B	12	4	4	1	5
Basal-like	19	15	14	12	2
Her-2+	26	13	9	7	11

DCIS, ductal carcinoma in situ; IDC, Invasive ductal carcinoma; P₁: Oct-4; P₂: Nanog; P₃: Oct-4+/Nanog+.