Table 1 Characteristics of the subjects and frequencies of gene methylation

the number of subjects

527

412

115

mean age ± SD

61.0 ± 13.7

60.0 ± 13.8

66.2 ± 9.7

0.0019

male : female

319 : 208

235 : 177

84:31

0.0018

H.pylori positive ratio

338/527

249/412

89/115

0.00091

DAPK methylated ratio

296/527

201/412

95/115

<0.0001

CDH1 methylated ratio

246/527

150/412

96/115

<0.0001