Table 5 showed that the mutant CYP2A6 allele gene, in a combination of homozygote and heterozygote (Mut/Mut + WT/Mut) variants, was associated with an increased risk of severe coronary stenosis with RR 1.21 (95% CI 1.02–1.43) compared to the WT. The gene discussed is CYP2A6; the disease is coronary stenosis.