Table 2. Comparisons table and log-rank test for prognostic factor categories.

POPULATION [K-Ras mutated codons]	PFS (95%CI) [mts]	OS (95%CI) [mts]
Codon 12, all patients (pts)	8.25 (95%CI: 7.48-9.01)	28 (95%CI: 23.67-32.32)
Codon 12, pts with >40% vs ≤40% mutant alleles	7.45 (95%CI: 5.78-9.21) vs 9.45 (95%CI: 8.47-10.4)	23 (95%CI: 19.79-26.20) vs 31 (95%CI: 27.00-34.99)
Codon 13, all pts	8.90 (95%CI: 7.69-10.10)	21 (95%CI: 16.63-25.36)
Codon 13, pts with >40% vs ≤40% mutant alleles	7.25 (95%CI: 3.6-10.89) vs 10.25 (95%CI: 8.15-12.32)	17 (95%CI: 11.61- 22.78) vs 24 (95%CI: 19.41- 28.58)
Rare codons, all pts	5.50 (95%CI: 2.95- 8.04)	31 (95%CI: 27.03-34.03)
Rare codons, pts with >40% vs ≤40% mutant alleles	5.5 (95%CI: 10.75-31.04) vs 7.25 (95%CI: 2.44-12.05)	-
All K- Ras mutated codons, pts with >40% vs ≤40% mutant alleles	7.25 (95%CI: 5.76-8.73) vs 9 (95%CI: 7.96-10.03)	21 (95%CI: 18.35-23.64) vs 31 (95%CI: 26.66-35.33)
Log-Rank P	P=0.000	P=0.002