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Table 1 Distribution of selected characteristics by case-control status in NPC association analysis.

From: Genetic polymorphisms of MDM2 and TP53 genes are associated with risk of nasopharyngeal carcinoma in a Chinese population

 

Cases

Controls

 

n

%

n

%

Sex

    

Male

315

60.3

404

56.7

Female

207

39.7

308

42.7

Age (years)

    

≤40

195

37.4

242

34.0

41-50

134

25.7

186

26.1

51-60

93

17.8

166

23.3

>60

100

19.1

118

16.6

Tumor stage

    

I

126

24.2

  

II

208

39.8

  

III

177

33.9

  

IV

11

2.1

  

EBV Infection status

    

Positive

329

63.1

  

Negative

162

31.0

  

Data missing

31

5.9

  

Metastasis

    

Present

283

54.2

  

Absent

239

45.8

  
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BMC Cancer

ISSN: 1471-2407

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