Table 2.

ORs associated with selected variables describing tobacco habit

No. casesNo. controlsAll controls, OR* (95% CI)CVD and respiratory diseases excluded (33 hospital controls), OR* (95% CI)
Smoking status
    Never16801
    Ex-regular smokers1021832.6 (1.4-4.8)2.7 (1.5-5.0)
    Current regular smokers931453.2 (1.7-6.0)3.0 (1.6-5.6)
Duration, y
    1-154190.8 (0.2-3.0)1.1 (0.3-3.8)
    16-40941672.9 (1.6-5.3)2.9 (1.6-5.4)
    41+971423.3 (1.7-6.2)3.0 (1.6-5.8)
Average no. cigarettes/d
    1-3581262.2 (1.2-4.2)2.2 (1.1-4.1)
    4-747972.5 (1.2-5.0)2.6 (1.3-5.4)
    7+881054.9 (2.5-9.7)4.7 (2.4-9.3)
Types of cigarettes
    Manufactured filtered only9261.6 (0.6-4.2)1.6 (0.6-4.1)
    Only traditional and manufactured unfiltered1582452.9 (1.7-5.2)2.9 (1.7-5.1)
    Smokers of all types26512.4 (1.2-4.9)2.4 (1.1-5.0)
Lifelong cumulative tobacco smoked (000s)
    <60371001.9 (1.0-3.8)1.9 (1.0-3.6)
    61-126561102.8 (1.4-5.3)2.8 (1.4-5.4)
    127+1001184.9 (2.5-9.4)4.9 (2.5-9.5)
Ever traditional products
    Smokers of manufactured products only15521.4 (0.6-3.1)1.3 (0.6-3.0)
    Smokers of traditional products1802763.1 (1.7-5.6)3.1 (1.7-5.5)
  • Abbreviation: CVD, cardiovascular disease.

  • * Reference category for all variables listed are never-smokers. ORs are adjusted for sex and age.