Table 1.
Baseline characteristics of REGARDS participants according to presence or absence of incident atrial fibrillation*
| Characteristic | Atrial Fibrillation | p-value† | |
|---|---|---|---|
| Yes (n=725) | No (n=8851) | ||
| Age (Years) | 67 ± 8 | 63 + 8 | <0.001 |
| Men | 407 (56%) | 3,668 (41%) | <0.001 |
| Black | 124 (17%) | 2,774 (31%) | <0.001 |
| Education ≤12 years | 203 (28%) | 2,585 (29%) | 0.49 |
| Annual Income | |||
| ≥ $20,000 | 563 (78%) | 6,920 (78%) | |
| < $20,000 | 79 (11%) | 983 (11%) | |
| Refused | 83 (11%) | 948 (11%) | 0.82 |
| Body mass index (kg/m2) | 29 ± 6 | 29 ± 6 | 0.15 |
| Systolic blood pressure (mmHg) | 127 ± 15 | 125 ± 15 | <0.001 |
| Diastolic blood pressure (mmHg) | 76 ± 9 | 76 ± 9 | 0.07 |
| Total cholesterol (mg/dL) | 188 ± 38 | 194 ± 39 | <0.001 |
| Glucose (mg/dL) | 100 ± 22 | 98 ± 25 | 0.16 |
| Smoker | |||
| Never or Former >1 year | 656 (90%) | 7,710 (87%) | |
| Former <1 year | 12 (2%) | 135 (2%) | |
| Current | 57 (8%) | 1,006 (11%) | 0.01 |
| Physical activity (times/week) | |||
| None | 195 (27%) | 2,548 (29%) | |
| 1 to 3 | 270 (37%) | 3,557 (40%) | |
| ≥4 | 260 (36%) | 2,746 (31%) | 0.03 |
| Healthy diet score | |||
| Poor | 578 (80%) | 6,948 (79%) | |
| Intermediate | 147 (20%) | 1,902 (21%) | |
| Ideal | 0 (0%) | 1 (<1%) | 0.52‡ |
| Alcohol consumption | |||
| None | 365 (50%) | 5,053 (57%) | |
| Moderate | 324 (45%) | 3,387 (38%) | |
| Heavy | 36 (5%) | 411 (5%) | <0.01 |
| Left ventricular hypertrophy§ | 57 (8%) | 650 (7%) | 0.61 |
| Coronary heart disease | 166 (23%) | 950 (11%) | <0.001 |
| Stroke | 37 (5%) | 253 (3%) | <0.001 |
*
Continuous variables are expressed as mean (SD). Categorical variables are N (percent).
†
Comparisons were made between cases and non-cases
‡
Fisher’s exact used to make statistical comparison.
§
Left ventricular hypertrophy was defined according to Sokolow-Lyon Criteria on ECG