Table 5

Matched pair analysis of HPV-16 serological status and smoking status risk estimates among cases

Matched pairsORa (95% CI)Adjusted ORb (95% CI)Adjusted ORc (95% CI)
Never-smokerEver-smoker
HPV-16+HPV-16−
HPV-16+12141.321.161.45
HPV-16−1123(0.58–2.78)(0.47–2.86)(0.44–4.76)
Oropharyngeal cancer cases
HPV-16+11132.171.792.33
HPV-16−65(0.83–5.56)(0.54–6.67)(0.54–14.29)
  • a Conditional logistic regression analyses on matching variables.

  • b Conditional logistic regression analyses on matching variables, adjusted for alcohol status.

  • c Conditional logistic regression analyses on matching variables, adjusted for alcohol and cotinine level.