KIF6 and myocardial infarction: For example, among African Americans in ARIC, each allele of KIF6 719Arg increased the risk for incident CHD by 1.23-fold (95%CI, 0.99–1.52)[3], and among African Americans in CHS, carriers of the KIF6 719Arg allele had a hazard ratio for incident myocardial infarction (MI) of 4.14 (90%CI, 0.79–21.77), compared with noncarriers[4].