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Table 1 Clinical data

From: Genome-wide methylation analysis identifies a core set of hypermethylated genes in CIMP-H colorectal cancer

Mutations and MSI

CIMP-H (true n = 32, clinical n = 26)

CIMP-L (true n = 13, clinical n = 10)

CIMP-N (true n = 47, clinical n = 37)

P value

BRAF mutant

14 (44%, 54%)

0 (0%)

3 (6%, 8%)

< 0.001

BRAF wildtype

12 (38%, 46%)

10 (77%, 100%)

34 (72%, 92%)

 

KRAS mutant

5 (16% 19%)

5 (38%, 50%)

6 (13%, 16%)

0.039a

KRAS wildtype

21 (66%, 81%)

5 (38%, 50%)

31 (66%, 84%)

 

MSI

9 (28%, 35%)

1 (8%, 10%)

6 (13%, 16%)

0.133

MSS

17 (53%, 65%

9 (69%, 90%)

31 (66%, 84%)

 

Colon location

    

Proximal

21 (66%, 81%)

7 (54%, 70%)

18 (38%, 49%)

0.016

Distal

5 (16%, 19%)

3 (23%, 30%)

19 (40%, 51%)

 

Differentiation

    

Moderate

10 (31%, 38%)

9 (69%, 90%)

30 (64%, 81%)

0.012

Moderate, mucinous

7 (22%, 27%)

1 (8%, 10%)

5 (11%, 14%)

0.197

Poor

4 (13%, 15%)

0 (0%)

2 (4%, 5%)

0.209

Well

4 (13%, 15%)

0 (0%)

0 (0%)

0.075

Gene panel CIMP status

    

CIMP-H

27 (84%)

1 (8%)

7 (15%)

< 0.001

CIMP-L

4 (13%)

1 (8%)

7 (15%)

 

CIMP-N

1 (3%)

11 (85%)

30 (64%)

< 0.001

Age (SD)

73.6 (7.7)

69.2 (11)

69 (12.3)

0.07

  1. Values are presented as mean (standard deviation) for continuous variables and count (percentage) for categorical variables. P values are comparisons between CIMP-H and CIMP-N tumour subtypes and are Fisher’s exact test (binary data) or Welch t test (continuous data).
  2. aEnrichment of KRAS mutations is a comparison between CIMP-L and CIMP-N tumour subtypes