Predictive Factor Clinical Benefit % P value
Age
> 65 versus < 65
89 versus 46

< 0.007
Prior metastatic treatment ;
< 4 versus > 4

87 versus 25
< 0.0007
Hormone receptor status
ER+/PR+ versus ER+/PR-
84 versus 42 < 0.05
Table 2: Predictive Factors of Clinical Benefit.