There were also differences in medians in groups defined by the PON1 c.575A>G, MPO c.−463G>A, and SOD2 c.47T>C genotypes in dominant and additive model analyses, but following the Bonferroni corrections, only the PON1 c.575A>G remained significant and was indicated to be independently associated with the extent of coronary atherosclerosis. Here, SOD2 is linked to coronary atherosclerosis.