Table 2 Adjusted odds ratio for all oropharyngeal cancer cases and by subsite compared with controlsa

From: Previous tonsillectomy modifies odds of tonsil and base of tongue cancer

  Oropharyngeal cancer Base of tongue cancer Tonsil cancer
  OR (95% CI) P -value OR (95% CI) P -value OR (95% CI) P -value
Tonsillectomy
No Ref Ref Ref
Yes 0.63 (0.47–0.85) 0.003 1.95 (1.25–3.06) 0.003 0.22 (0.13–0.36) <0.001
Number of sexual partners
0–1 Ref Ref Ref
2–5 2.44 (1.40–4.27) 0.002 2.1 (0.84–5.21) 0.110 3.44 (1.5–7.91) 0.004
6–14 3.81 (2.19–6.60) <0.001 3.42 (1.42–8.27) 0.006 5.69 (2.49–13) <0.001
14+ 4.65 (2.65–8.18) <0.001 3.75 (1.52–9.21) 0.004 7.73 (3.33–17.96) <0.001
Education
Some High School Ref Ref Ref
Completed High School 0.61 (0.41–0.91) –0.015 0.67 (0.34–1.32) –0.248 0.59 (0.36–0.97) –0.037
Some College and above 0.45 (0.31–0.66) <0.001 0.54 (0.29–1.03) 0.061 0.4 (0.25–0.64) <0.001
Pack-years
<10 Pack-years Ref Ref Ref
10 Pack-years 2.2 (1.62–2.97) <0.001 1.91 (1.18–3.09) 0.009 2.23 (1.5–3.32) <0.001
Insurance
Private Ref Ref Ref
Medicaid/Medicare 0.84 (0.57–1.25) 0.393 0.59 (0.3–1.13) 0.113 0.78 (0.46–1.31) 0.341
None 0.92 (0.55–1.53) 0.743 0.86 (0.37–1.98) 0.717 0.93 (0.51–1.72) 0.823
Other 0.7 (0.45–1.09) 0.112 0.6 (0.3–1.19) 0.1434 0.81 (0.47–1.41) 0.464
Alcohol
1 Drink per week Ref Ref Ref
>1 Drink per week 1.72 (1.16–2.56) 0.007 1.23 (0.67–2.27) 0.503 1.67 (0.98–2.84) 0.058
  1. Abbreviations: CI=confidence interval; OR=odds ratio; Ref=reference value.
  2. aOdds ratios are all mutually adjusted for in addition to matching factors (age, race, and gender).