Table 1

Main characteristics of the study population

Oral/pharyngeal cancer patients (n = 121)Laryngeal cancer patients (n = 129)Control individuals (n = 172)
Male (%)113 (93%)127 (98%)163 (95%)
Age, years
Mean (SD)54.4 (10.2)55.0 (9.4)54.9 (11.1)
Range25–8922–8525–88
Mean daily alcohol consumption, g/day (SD)111.8 (71.5)a98.1 (69.9)b77.1 (64.0)
Mean duration of alcohol drinking, years (SD)30.3 (12.6)30.1 (14.1)29.0 (16.5)
Mean daily tobacco consumption, g/day (SD)28.2 (13.6)c30.4 (15.8)b25.1 (12.5)
Mean duration of smoking, years (SD)33.9 (10.2)34.6 (8.8)c32.2 (11.6)
  • a P = 0.0001, Wilcoxon’s rank-sum test (comparison with control individuals).

  • b P < 0.01, Wilcoxon’s rank-sum test (comparison with control individuals).

  • c P < 0.05, t test (comparison with control individuals).