From: An 8-gene mRNA expression profile in circulating tumor cells predicts response to aromatase inhibitors in metastatic breast cancer patients
8-gene CTC profile
PFS <9Â months
Favorable
Unfavorable
Total
 No
16
19
35
 Yes
17
36
33
38
71
Pearson’s X 2 statistic
0,016
P
0.899