Table 2.
Multivariant analysis of various prognostic/predictive factors of cetuximab efficacy using Cox proportional hazard model of survival: EGFR protein expression of the primary tumors (N = 88).
| Variables | p | RR (95% CI) |
|---|---|---|
| age | 0.001 | 0.967 (0.943–0.993) |
| sex | 0.715 | 1.099 (0.661–1.826) |
| EGFR-HS | 0.53 | 1.001 (0.997–1.006) |
| sidedness | 0.009 | 2.028 (1.193–3.448) |
| metastasis (S vs. M) | 0.1 | 0.643 (0.38–1.089) |
Multiple metastatic disease (M), relative risk (RR), single metastatic disease (S), sidedness = left or right.