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Table 1 Selected demographic characteristics of colorectal cancer cases and controls

From: Association of estrogen receptor betavariants and serum levels of estradiol with risk of colorectal cancer: a case control study

 

Controls (n = 445)

Cases (n = 390)

 

Characteristics

n

%

n

%

P-valuea

Age, years

     

 ≤ 48

239

53.7

82

21.0

<0.001

 >48

206

46.3

308

79.0

 

Smoking status

     

 Ever

283

63.6

181

46.4

<0.001

 Never

162

36.4

209

53.6

 

Alcohol drinking Status

     

 Ever

292

65.6

137

39.0

<0.001

 Never

153

34.4

214

61.0

 
  1. a P values were calculated from chi-square test.
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BMC Cancer

ISSN: 1471-2407

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