Table 1.

ORs and 95% CIs for smoking status and type of tobacco smoked

Males
Females
Cases/controlsOR* (95% CI)Cases/controlsOR* (95% CI)
Smoking status
    Never smoked55/2271.0106/1401.0
    Occasional smokers35/841.7 (1.0-2.8)16/131.4 (0.6-3.6)
    Ever (regular) smokers950/7825.1 (3.7-7.0)27/123.3 (1.3-8.0)
P < 0.0001P = 0.007
    Never smoked55/2271.0106/1401.0
    Former smokers453/4643.8 (2.8-5.3)6/61.8 (0.5-7.2)
    Current smokers492/3147.4 (5.3-10.4)21/65.1 (1.6-16.4)
P < 0.0001P = 0.005
Tobacco type
    Never smoked55/2271.0106/1401.0
    Blond tobacco only86/1183.2 (2.1-4.8)9/71.6 (0.4-6.0)
    Black tobacco only391/3025.3 (3.8-7.4)5/23.8 (0.4-38.3)
    Both283/2066.0 (4.2-8.5)7/1
P < 0.0001
Black tobacco only
    Never smoked55/2271.0106/1401.0
    Former smokers211/1944.2 (2.9-6.0)0/1
    Current smokers176/1077.3 (4.9-10.9)5/1
P < 0.0001
Blond tobacco only
    Never smoked55/2271.0106/1401.0
    Former smokers26/631.8 (1.0-3.2)3/3
    Current smokers60/545.8 (3.4-10.0)6/4
P < 0.0001
  • * Adjusted for age, hospital region, fruit/vegetable consumption, and high-risk occupation.

  • An occasional smoker is one who reported smoking at least ≥100 cigarettes during his lifetime but who did not smoke regularly (at least one cigarette per day for ≥6 months). No further information was available for occasional smokers, and they are excluded from all subsequent analyses.

  • Subjects were defined as current smokers if the year they quit smoking was within 1 year of the interview.