Table I.

Patient characteristics.

		Primary tumor status
		Estrogen receptor			Progesterone receptor
Variable	All patients	Positive	Negative	P-value	Positive	Negative	P-value
Patients (n)	70	48	22		38	32
Age (mean ± SD)	54.5±15.5	55.8±15.5	51.8±15.6	0.320	53.6±17.3	55.6±13.3	0.603
Menopausal status (at original diagnosis)
Premenopausal	32	23	9	0.585	21	11	0.081
Postmenopausal	38	25	13		17	21
Pathological type
Invasive ductal carcinoma	61	41	20	0.213	32	29	0.398
Invasive lobular carcinoma	2	2	0		2	0
Invasive micropapillary carcinoma	3	3	0		2	1
Medullary carcinoma	2	0	1		0	1
Spindle cell carcinoma	1	0	1		0	1
Ductal carcinoma in situ	1	1	0		1	0
Surgical procedure
Mastectomy	54	39	15	0.227	30	24	0.695
Partial resection	16	9	7		8	8
Histological grade
1	8	6	2	0.001	5	3	0.314
2	35	30	5		22	13
3	18	10	8		8	10
Unknown	9	2	7		3	6
TNM stage
Tis	1	1	0	0.801	1	0	0.568
T1	21	12	9		10	11
T2	33	24	9		20	13
T3	7	5	2		2	5
T4	5	4	1		3	2
Unknown	3	2	1		2	1
N0	29	16	13	0.198	15	14	0.673
N1	34	25	9		19	15
N2	3	3	0		1	2
N3	2	2	0		1	1
Unknown	2	2	0		2	0
Stage
0	1	1	0	0.803	1	0	0.818
I	14	17	7		7	7
II	39	27	12		22	17
III	13	11	2		6	7
Unknown	3	2	1		2	1

SD, standard deviation.