Table 4

Association between XRCC1 genotypes and squamous cell carcinoma according to pack-years of smoking

Genotype≤40 pack-years>40 pack-years
Control (%)Case (%)Adjusteda OR (CI)Control (%)Case (%)Adjusted OR (CI)
Arg/Arg67 (62.0)34 (47.2)1.0014 (51.9)17 (43.6)1.00
Arg/Gln38 (35.2)29 (40.3)1.48 (0.78–2.80)10 (37.0)17 (43.6)1.44 (0.50–4.17)
Gln/Gln3 (2.8)9 (12.5)5.75 (1.46–22.69)3 (11.1)5 (12.8)1.38 (0.28–6.83)
Arg/Gln + Gln/Gln41 (38.0)38 (52.8)1.79 (0.98–3.28)b13 (48.1)22 (56.4)1.43 (0.53–3.85)
  • a Adjusted for age.

  • b P = 0.06.