Figure 2.

Oral anticoagulation (OAC) prescription rates by county. OAC prescription rates are shown at a population level, split into 4 quartiles. Prescription rates are defined as [atrial fibrillation patients with OAC prescriptions] / [atrial fibrillation patients]. The circle size denotes the number of PINNACLE (Practice Innovation and Clinical Excellence) patients treated within that area. The OAC prescription rates are shown by color, with red/orange areas indicating worse rates and green areas indicating better rates. A histogram is also shown, indicating how many counties fall in each bin of OAC adherence.