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Table 1 Clinicopathological and molecular data of colon adenomas and carcinomas

From: DNA methylation alterations of AXIN2 in serrated adenomas and colon carcinomas with microsatellite instability

 

TA (n = 8)

SSA (n = 19)

MSS (n = 12)

MSI (n = 13)

P-value3

Age

65.4 ± 4.4

60.6 ± 9.8

62.2 ± 8.2

70.8 ± 11.3

0.019 (a)

Gender (M/F)

4/4

13/6

6/6

6/7

0.57

Duke’s stage

NA

NA

7/5

11/2

0.20

(A or B/C)

Grade 1

NA

NA

12/0

9/4

0.096

(W-M/P)

KRAS Mutations

4/8

0/19

4/12

0/13

0.0011

(mut/total)

BRAF Mutations

0/8

19/19

4/12

9/13

2.2×10 -6

(mut/total)

hMLH1 Methylation (+/total )

0/8

0/19

0/12

5/13

8.6×10 -4

Hypermethylation 2

1.8 ± 1.4%

1.2 ± 0.6%

1.2 ± 0.6%

1.9 ± 1.2%

0.15(a)

Hypomethylation 2

0.6 ± 0.4%

0.3 ± 0.2%

1.0 ± 0.5%

1.0 ± 0.6%

5.8×10 -4 (a)

  1. 1Tumor grade. Well (W), moderately (M) or poorly (P) differentiated.
  2. 2Hypermethylation and hypomethylation indicate the percentage of MS-AFLP array probes with values surpassing the hypermethylation and hypomethylation thresholds, respectively.
  3. 3For categorical data, p-values were calculated by χ2 test when comparing four groups, or by Fisher’s exact test when comparing two groups. For continuous data, we applied one-way ANOVA followed by Tukey’s HSD multi-hypothesis testing correction. The most Statistically significant p-value after correction corresponded always to the SSA vs MSI comparison(a). In hypomethylation, a significant difference between SSA and MSS was also found (P = 0.0014). P-values below 0.05 are in bold type.
  4. NA: Not applicable.