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Table 1 Selected characteristics of the individuals

From: Methylation status of COX-2 in blood leukocyte DNA and risk of gastric cancer in a high-risk Chinese population

Variables

Post-GC

SG/mild CAG

P a

n = 95

n =285

Age (%)

  

1.00

  < 60

40(42.1)

120(42.1)

 

  ≥ 60

55(57.9)

165(57.9)

 

Gender (%)

  

1.00

 Female

26(27.4)

78(27.4)

 

 Male

69(72.6)

207(72.6)

 

Smoking (%)

  

0.99

 Ever smoke

57(60.0)

173(60.7)

 

 Never smoke

37(38.9)

112(39.3)

 

 Missing

1(1.1)

  

Drinking (%)

  

0.93

 Ever drink

48(50.5)

154(54.0)

 

 Never drink

40(42.1)

131(46.0)

 

 Missing

7(7.4)

  

H. pylori infection (%)

  

<0.001

 Ever infected

84(88.4)

175(61.4)

 

 Never infected

11(11.6)

110(38.6)

 
  1. a χ2 test, P value for each covariate was estimated among participants without missing value in that variate