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. 2013 Jul 19;12:80. doi: 10.1186/1476-4598-12-80

Table 2.

Demographic and risk factors in patients and controls and their association with risk of OSCC

Variables
 Patients (n = 325)
 Controls (n = 335)*
  No. % No. %
Age (years)
  
  
  
  
  ≤ 40
 31
 9.5
 27
 8.1
  41 – 55
 126
 38.8
 105
 31.3
  56 – 70
 119
 36.7
 154
 46.0
  > 70
 49
 15.0
 49
 14.6
Sex
  
  
  
  
  Male
 241
 74.2
 269
 80.3
  Female
 84
 25.8
 66
 19.7
Tobacco smoking
  
  
  
  
  Ever
 227
 69.8
 239
 71.3
  Never
 98
 30.2
 96
 28.7
Alcohol drinking
  
  
  
  
  Ever
 250
 76.9
 240
 71.6
  Never
 75
 23.1
 95
 28.4
HPV16 serologya
  
  
  
  
  Negative
 225
 69.2
 293
 87.5
  Positive 100 30.8 42 12.5

*The cases and controls were adequately frequency-matched.

asignificantly different in HPV16 serological status between cases and controls.