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Table 3 Risk of death from colorectal cancer according to KRAS codons 12 and 13, and BRAF mutations

From: Sex differences in the prognostic significance of KRAS codons 12 and 13, and BRAF mutations in colorectal cancer: a cohort study

 

Entire cohort

 

Women

 

Men

 

HR (95% CI)

n(events)

HR (95% CI)

n(events)

HR (95% CI)

n(events)

KRAS status (unadjusted)

      

 Wild-type

1.00

334 (113)

1.00

177 (52)

1.00

157 (61)

 Codon 12-mutated

1.05 (0.76–1.45)

156 (54)

1.32 (0.85–2.05)

83 (32)

0.81 (0.50–1.32)

73 (22)

 Codon 13-mutated

1.94 (1.18–3.19)

34 (18)

2.58 (1.31–5.09)

18 (10)

1.42 (0.68–2.96)

16 (8)

KRAS status (adjusted)

      

 Wild-type

1.00

273 (87)

1.00

146 (39)

1.00

127 (65)

 Codon 12-mutated

1.02 (0.69–1.51)

132 (44)

1.29 (0.75–2.22)

67 (24)

0.74 (0.42–1.30)

65 (20)

 Codon 13-mutated

1.37 (0.74–2.54)

28 (13)

1.83 (0.79–4.23)

15 (7)

0.87 (0.34–2.72)

13 (6)

BRAF status (unadjusted)

      

 Wild-type

1.00

446 (154)

1.00

227 (75)

1.00

219 (79)

 Mutated

1.32 (0.90–1.94)

78 (32)

1.23 (0.74–2.04)

50 (19)

1.56 (0.87–2.81)

28 (13)

BRAF status (adjusted)

      

 Wild-type

1.00

370 (122)

1.00

184 (56)

1.00

186 (66)

 Mutated

1.56 (0.87–2.79)

63 (22)

1.47 ( 0.65–3.33)

44 (14)

3.50 (1.41–8.70)

19 (8)

  1. Adjusted analysis included age (continuous), sex, T stage (I-II, III, IV), N stage (0, 1, 2), M stage (0, 1), differentiation grade (high-intermediate vs. low and vascular invasion (+/−/unknown)), KRAS mutation status (wild-type, codon 12 mutation, codon 13 mutation) and BRAF mutation status (wild-type, mutated). One case with mutual KRAS codons 12 and 13 mutation was excluded from the analyses related to KRAS mutational status.