Table 1

Age distribution and smoking habits among cases and controls

CasesControls
No.%No.%
Age (yr)
 30–3910.473.6
 40–49104.1199.6
 50–593112.95226.4
 60–698936.97035.5
 70–799037.34020.3
 ≥80208.394.6
 Mean ± SD67.6 ± 9.262.0 ± 11.3
Smoking habits
 Never smoked
 Ex-smokers (cigarette-years)
  0–399135.45226.4
  400–799125.0126.1
  800–1199114.6115.6
  1200+239.573.6
 Current smokers (cigarette-years)3112.9105.1
  0–399135.4168.1
  400–7992811.62914.7
  800–11995723.72010.2
  1200–15992410.073.6
  1600–1999104.252.5
  2000+156.242.0
 Unknown41.72412.2