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Figure 1 Percentage of Plaques With Perl's Iron Stain by Hp Genotype and DM Status

In patients with diabetes mellitus (DM), 24 of 52 plaques from 9 haptoglobin (Hp) 2-2 decedents compared with 6 of 51 plaques from 12 Hp 1-1 or 2-1 decedents demonstrated Perl's iron stain. In patients without DM, 11 of 41 plaques from 7 Hp 2-2 decedents compared with 5 of 45 plaques from 9 Hp 1-1 or 2-1 decedents demonstrated Perl's iron stain.