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Table 1 Frequency distribution of demographic and risk factors in SCCHN cases and controls

From: Genetic variants of NOXA and MCL1 modify the risk of HPV16-associated squamous cell carcinoma of the head and neck

Characteristics

Patients (n = 380)

Controlsa (n = 335)

P valueb

No.

%

No.

%

Age (years)

    

0.526

 <40

32

8.4

27

8.1

 

 41–55

142

37.4

109

32.5

 

 56–70

159

41.8

157

46.9

 

 >70

47

12.4

42

12.5

 

Sex

    

0.100

 Male

285

75.0

269

80.3

 

 Female

95

25.0

66

19.7

 

 Ethnicity

     

 Non-Hispanic white

380

100.0

335

100.0

 

Tobacco smoking

    

0.588

 Ever

278

73.2

239

71.3

 

 Never

102

26.8

96

28.7

 

Alcohol drinking

     

 Ever

296

77.9

240

71.6

0.054

 Never

84

22.1

95

28.4

 

Tumor site

     

 Oropharyngeal

187

49.2

   

 Non-Oropharyngeal

193

50.8

   
  1. a The controls were frequency matched to the patients on the factors shown in this table.
  2. b Two-sided χ 2 test.