Parameter PFS OS
HR 95% CI P-value HR 95% CI P-value
Age>60 0.57 0.176-1.849 0.35 1.133 0.372-3.455 0.826
Sex: male vs. female 0.8 0.469-1.365 0.413 1.22 0.688-2.164 0.496
PS ≥ 1 1.352 0.439-4.162 0.599 3.872 1.164-12.877 0.027
Presence of primary site 3.756 0.721-19.559 0.116 1.817 0.21-15.706 0.587
Advanced vsrecurrence 0.803 0.47-1.371 0.421 1.008 0.605-1.678 0.977
Liver metastasis 0.477 0.133-1.71 0.256 0.946 0.325-2.756 0.919
Lung metastasis 1.641 0.504-5.338 0.411 0.395 0.128-1.216 0.105
Lymph node metastasis 2.231 0.72-6.914 0.164 0.944 0.337-2.642 0.913
Peritoneal metastasis 0.927 0.282-3.046 0.9 2.243 0.721-6.978 0.163
CEA>10 ng/ml 1.02 0.22-4.726 0.979 3.031 0.377-24.346 0.297
CA19-9>100 U/ml 1.287 0.429-3.864 0.653 1.778 0.556-5.69 0.332
Interval between Cmab and Pmab<120 days 0.011 0-2.052 0.091 0.407 0.129-1.287 0.126
CTC ≥ 1 3.277 0.964-11.144 0.057 2.467 0.81-7.51 0.112
CTC ≥ 2 5.017 1.366-18.427 0.015 2.097 0.724-6.075 0.173
CTC ≥ 3 3.268 0.913-11.698 0.069 2.091 0.714-6.122 0.178
HR=Hazard Ratio; CI=Confidence Interval; PS=Performance Status; CEA=CarcinoEmbryonic Antigen; CA19-9=Carbohydrate Antigen 19-9; Cmab=cetuximab; Pmab=Panitumumab; CTC=Circulating Tumor Cells; PFS=Progression-Free Survival; OS=Overall Survival.
Table 2:Univariate analysis for PFS and OS.