Table 4

Case-only analysis. ORs are adjusted by age, gender, and study (studies: Refs. 13 14 15 16 17 , plus Daly, unpublished data)

NAT2OR (95% CI)
RapidSlow
Nonsmokers1071581.0
Smokers3416711.26 (0.91–1.73)
 Ex-smokers1051400.99 (0.55–1.79)
 Current smokers932331.49 (0.84–2.67)
Occupational exposure
 No1532781.0
 Yes1943560.86 (0.62–1.19)