Table 6

Comparison of ORs for lung cancer in recent Japanese and Western studies

SCCaACaAll typesa
 Present studyb5.718.
Western Europe
United States
 Present Study e e 6.425.610.540.4
 Thun23 f 19.2
  • a Reference group is nonsmokers.

  • b Risks estimated using community controls.

  • c Ex-smokers were included with current smokers.

  • d Estimated from published data.

  • e Could not be estimated because of the lack of nonsmoking cases.

  • f Not reported because of too few nonsmoking cases.