Table 3

Demographics of patients and control subjects

SubjectsSample size (n)Gendera (M/F)Age (yr)bMean ± SE (range)Alcohol usecTobacco used
Cancer118/351.9 ± 5.0 (24–77)88
Papilloma128/543.6 ± 3.6 (25–73)87
Normal129/454.8 ± 4.5 (29–77)83
  • a There is no statistically significant difference in gender between groups (Fisher’s exact test, P > 0.6).

  • b There is no statistically significant difference in ages between groups (t test, P > 0.18).

  • c There is no statistically significant difference in consuming tobacco and alcohol between groups (Fisher’s exact test, P > 0.2).

  • d A significant difference is observed when comparing smoking history between SCC patients and control subjects (Fisher’s exact test, P = 0.04).