Table 1. Characteristics of the study population and prevalence (%) of atrial fibrillation (AF), stratified by ethnicity and geographic region.
| Variable | Entire population n = 18 833 |
Region | Ethnicity | ||
| Stroke Belt n = 9786 |
Non-Stroke Belt n = 032 |
Blacks n = 7722 |
Whites n = 11 105 |
||
| Age (years) | 65.9 ± 9.0 | 65.4 ± 8.9 | 66.5 ± 9.0 | 65.3 ± 8.9 | 66.3 ± 9.0 |
| Females (%) | 51.5 | 52.1 | 50.8 | 59.6 | 45.8 |
| Blacks (%) | 41.0 | 34.8 | 47.8 | 100.0 | 0.0 |
| Body Mass Index (wt/ht2) | 29.2 ± 6.1 | 29.1 ± 6.1 | 29.3 ± 6.1 | 30.6 ± 6.7 | 28.2 ± 5.5 |
| Hypertension (%) | 57.5 | 57.8 | 57.2 | 69.4 | 49.2 |
| Diabetes (%) | 21.2 | 21.8 | 20.7 | 29.6 | 15.5 |
| AF (%) | |||||
| SR plus ECG | 0.8 | 0.7 | 0.9 | 0.2 | 1.2 |
| ECG | 1.4 | 1.3 | 1.5 | 0.7 | 1.8 |
| SR | 7.2 | 7.3 | 7.1 | 6.3 | 7.8 |
| SR or ECG | 7.8 | 7.8 | 7.8 | 6.8 | 8.5 |
*SR = Self-reported; ECG = Electrocardiogram.