Three maps depict the state of Minnesota with county borders. The first map displays the incidence of lower limb ischemic amputation; the second, coronary heart disease (CHD) mortality; and the third, stroke mortality.

The legend shows the quartile ranking of the outcome displayed on each map; quartile 1 represents the lowest incidence and quartile 4 represents the highest incidence. Data for counties with fewer than 10 cases over 4 years are suppressed, and data for counties with 11 to 20 cases over 4 years are shown but are noted as unstable.

In general, the highest lower limb ischemic amputation incidence and highest CHD and stroke mortality rates are concentrated in counties in the northern half of Minnesota and in rural counties. The pattern is similar, but not entirely overlapping, for all 3 outcomes.