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Table 2 Number of patients with CK20 positive tumor cells and association with patients’ characteristics

From: Detection of circulating tumor cells with CK20 RT-PCR is an independent negative prognostic marker in colon cancer patients – a prospective study

Characteristics category CK20+
BL
Detection rate (%) P CK20+BM Detection rate (%) P
All   112 37.4 - 81 35.7 -
Sex male 60 35.7 0.50 42 31.3 0.101
female 52 39.7   39 41.9  
Age [years] < 70 62 38.7 0.636 38 32.7 0.216
> 70 50 35.9   43 39.8  
UICC stage I 28 32.2 0.017 20 31.7 0.633
II 32 34.0   28 37.3  
III 29 36.2   20 33.3  
IV 23 60.5   13 44.8  
pT T1 9 21.4 0.019 7 25.9 0.633
T2 29 41.4   21 38.8  
T3 58 36.5   44 35.7  
T4 16 57.1   9 39.1  
pN N0 66 34.7 0.134 51 34.9 0.646
N1 24 36.9   20 40.8  
N2 22 50.0   10 31.2  
Grading G1 7 35.0 0.280 5 33.3 0.252
G2 84 35.6   60 33.5  
G3 21 48.8   16 48.4  
Liver Metastases M0 89 35.1 0.002 68 34.3 0.271
M1 23 62.1   13 44.8  
  1. BL blood, BM bone marrow
  2. The data in bold are regarded statistically significant (p < 0.05)