| Group | N | No. of Stroke Events | Total Follow-up Person-Years | Incidence Rate | 95% Confidence Interval | |
| Stroke event subtype | ||||||
| Ischemic stroke | ||||||
| Atherothrombotic infarction | 3483 | 13 | 53,910.94 | 0.24 | 0.11 | 0.37 |
| Cardioembolic infarction | 3483 | 107 | 53,335.39 | 2.01 | 1.63 | 2.39 |
| Lacunar infarction | 3483 | 42 | 53,638.54 | 0.78 | 0.54 | 1.02 |
| Other unknown infarction | 3483 | 43 | 53,768.89 | 0.80 | 0.56 | 1.04 |
| Hemorrhagic stroke | ||||||
| Intraparenchymal hemorrhage | 3483 | 29 | 53,891.19 | 0.54 | 0.34 | 0.74 |
| Subarachnoid hemorrhage | 3483 | 5 | 53,934.42 | 0.09 | 0.01 | 0.17 |
| Unknown type of stroke | 3483 | 57 | 53,778.16 | 1.06 | 0.78 | 1.34 |
| Transient ischemic attack (TIA) | 3483 | 1 | 53,976.47 | 0.02 | −0.02 | 0.06 |
| All Stroke | 3483 | 297 | 52,398.72 | 5.67 | 5.03 | 6.31 |
| Women | 2043 | 179 | 31,877.86 | 5.62 | 4.80 | 6.44 |
| Men | 1440 | 118 | 20,520.86 | 5.75 | 4.71 | 6.79 |
| Age Group | ||||||
| 45 - 54 | 1701 | 99 | 28,205.97 | 3.51 | 2.82 | 4.20 |
| 55 - 64 | 1155 | 124 | 16,749.30 | 7.40 | 6.10 | 8.70 |
| 65 - 74 | 627 | 74 | 7443.45 | 9.94 | 7.67 | 12.21 |
| Center | ||||||
| South/North Dakotas | 1509 | 150 | 21,876.84 | 6.86 | 5.76 | 7.96 |
| Oklahoma | 1508 | 125 | 23,700.31 | 5.27 | 4.35 | 6.19 |
| Arizona | 466 | 22 | 6821.57 | 3.23 | 1.88 | 4.58 |