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Table 2 Survival data of 59 patients stratified into 3 risk groups according to baseline CTC counts

From: Detection of circulating tumor cells in blood of metastatic breast cancer patients using a combination of cytokeratin and EpCAM antibodies

Risk Group

Death N (%)

Censored N (%)

Quartile Survival [weeks]

Median Survival [weeks]

CTC-L (0 CTC) N = 20

2 (10.0)

18 (90.0)

100 95%CI = [85,+oo]

>100 95%CI = [85,+oo]

CTC-M (1-4 CTC) N = 15

7 (46.7)

8 (53.3)

32 95%CI = [12,78]

>78 95%CI = [20,+oo]

CTC-H (≥5 CTC) N = 24

17 (70.8)

7 (29.2)

22 95%CI = [2,42]

60 95%CI = [27,73]

TOTAL N = 59

26 (44.1)

33 (55.9)

46 95%CI = [20,70]

100 95%CI = [70,+oo]

  1. Quartile and median survival times are given together with confidence intervals (CI). N is the number of patients in the respective group.