Table 2 Conditional logistic regression models examining XRCC1 polymorphisms and postmenopausal breast cancer stratified by smoking status.

Arg194Trp

   Arg/Arg

No. of cases/no. of controls

217/237

216/175

OR^a (95% CI)

1.00 (ref.)

1.00 (ref.)

   Arg/Trp or Trp/Trp

No. of cases/no. of controls

26/36

21/32

OR^a (95% CI)

0.78 (0.43–1.40)

0.47 (0.24–0.94)

Arg399Gln

   Arg/Arg

No. of cases/no. of controls

107/104

88/88

OR^a (95% CI)

1.00 (ref.)

1.00 (ref.)

   Arg/Gln

No. of cases/no. of controls

100/112

92/89

OR^a (95% CI)

0.91 (0.57–1.43)

1.06 (0.66–1.72)

   Gln/Gln

No. of cases/no. of controls

23/35

38/20

OR^a (95% CI)

0.64 (0.33–1.26)

2.76 (1.36–5.63)