Table 2.

Results of ddCTC detection and statistical analysis

				Khi2	Barnet Woolf
Patient cohort characteristics		negative ddCTC	positive ddCTC	P	P
Number		37	24
				NS	NS
Histology	Invasive ductal carcinoma	28	19
	Invasive lobular carcinoma	8	3
	Others	1	2
				NS	NS
Molecular	Luminal A	32	21
Characteristics	Luminal B	2	1
	Triple negative	2	2
	Her2 overexpression	1	0
				NS	NS
Size tumour	T1	17	12
	T2	18	10
	T3 and T4	2	2
				0.05*	< 0.05*
Lymph node	N+	13	3
status
	N-	24	21
				NS	NS
Tumor grade	I	8	5
	II	22	14
	III	5	4
	Unknown	2	1
				ND	ND
Hormonal	ER+	37	21
status	ER-	0	3
				NS	NS
	PR+	28	18
	PR-	9	6

Values of P for Khi2 and Barnet Woolf tests are indicated for each clinicopathological characteristics of tumors

*significance level: P 0.05, NS: P > 0.05 for alpha risk 5%; ND: not determined