Case Age Sex PFS
(months)
OS
(months)
Interval between Cmab and Pmab <120 days* Best overallĀ  response CTC count
1 64 F 0.4 1.7 Yes PD 19
2 45 F 2.3 4.3 Yes PD 21
3 54 F 3.0 6.4 Yes PD 1
4 43 M 4.5 17.6 Yes SD 0
5 48 M 1.0 1.9 Yes PD 18
6 40 F 3.0 4.9 Yes PD 0
7 40 M 1.8 3.2 Yes PD 2
8 57 M 0.5 2.2 No NE 12
9 74 F 5.3 10.7 No SD 0
10 60 F 3.6 7.1 No SD 0
11 58 M 3.5 11.2 Yes SD 9
12 47 F 2.1 5.2 Yes PD 2
13 41 M 2.0 3.5 Yes PD 0
14 59 M 4.6 12.8 No SD 0
15 71 F 1.4 4.8 Yes PD 0
16 78 F 0.7 10.3 Yes NE 4
17 54 M 1.4 3.1 Yes PD 222
18 71 F 4.1 6.7 Yes PD 1
19 61 M 2.6 9.0 Yes PD 0
PFS=Progression-Free Survival; OS=Overall Survival; CTC=Circulating Tumor Cells; SD=Stable Disease; PD=Progressive Disease; NE=Not Evaluable; Cmab=Cetuximab; Pmab=Panitumumab. *Interval between last administration of cetuximab and first administration of panitumumab. Blood sample for CTC count was taken on same day as administration of panitumumab.
Table 1(b): Relationship between clinical outcome and CTC count.