Table 4. PSA responses rate of 30 patients treated by docetaxel based chemotherapy.

Variables	Number of patients	PSA response, n (%)	P value
All patients	30	17 (56.7)
CTC enumeration
≥5	12	8 (66.7)	0.465
<5	18	9 (50.0)
Stem cell gene expression
Yes	12	3 (25.0)	0.008
No	18	14 (77.8)
EMT gene expression
Yes	20	11 (55.0)	1.000
No	10	6 (60.0)

CTC, circulating tumor cell; EMT, epithelial mesenchymal transition.