Table 3.

ORs and 95% CIs associated with tobacco smoking by histologic type (population and hospital controls pooled)

Squamous cell carcinomaAdenocarcinomaOther and unknown
Never or occasional*111
    No. cases/controls
Lifelong cigarettes smoked (000s)
    <602.7 (1.1-6.6)0.80 (0.2-2.6)3.1 (0.6-15.3)
    61-1273.1 (1.3-7.8)1.3 (0.3-4.0)5.7 (1.2-26.8)
    128+6.8 (2.8-16.8)2.5 (0.8-7.3)7.4 (1.5-36.4)
Test for trend, P0.000.130.01
  • NOTE: ORs were adjusted for sex, age, and both.

  • * Reference category.