Table 6

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

SCCaACaAll typesa
ExCurrentExCurrentExCurrent
Japan
 Present studyb5.718.51.53.22.26.3
 Nakamura223.76.01.72.8
 Ohno202.54.1
 Gao43.66.6
 Shimizu2112.8c1.5c3.1c,d
 Sobue1713.118.11.51.92.84.1
Western Europe
 Lubin188.4–23.020.91.8–3.53.5
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.