Table 5

Association of well-done meat intake and breast cancer risk stratified by NAT2 genotype and cigarette smoking

Meat doneness scoreNAT2 (slow)NAT2 (rapid/intermediate)
Cases/ controlsOR (95% CI)aCases/ controlsOR (95% CI)a
Study participants
3–424 /711.0 (reference)13/651.0 (reference)
520 /511.2 (0.6–2.3)25/393.2 (1.5–7.0)
6–938 /661.7 (0.9–3.1)36/543.3 (1.6–6.8)
Test for interaction P = 0.154
Never smokers
3–420 /511.0 (reference) 8/401.0 (reference)
5–939 /771.3 (0.7–2.5)38/662.9 (1.2–6.7)
Test for interaction P = 0.148
Ever smokers
3–44 /201.0 (reference) 4/231.0 (reference)
5–918 /392.2 (0.7–7.5)22/255.0 (1.5–16.8)
Test for interaction P = 0.340
  • a Adjusted for age.