Table I.

Sample characteristics.

Patient/tumor traits	Subgroups/no. of samples
Age at primary diagnosis, years
<50	11
50–60	55
60–70	69
70–80	50
>80	18
Tumor size
T1	166
T2	15
T3	17
T4	5
Lymph node status
Nx	57
N0	135
N1	11
Metastasis status
Mx	76
M0	124
M1	3
Grading
G1	113
G2	68
G3	22
ERα
Positive	92
Negative	111
ERβ
Positive	28
Negative	175
PRA
Positive	92
Negative	111
PRB
Positive	103
Negative	100

ER, estrogen receptor; PR, progesterone receptor.