Table 1.
Clinical characteristics present at the time of initial diagnosis of atrial flutter versus atrial fibrillation in a general population in the Marshfield Epidemiologic Study Area (MESA).
| Clinical characteristics | AFL (n=76) | AF (n=396) | P-value* |
|---|---|---|---|
| Chronic obstructive pulmonary disease | 19 (25%) | 48 (12%) | 0.006 |
| Hypertension | 36 (47%) | 250 (63%) | 0.01 |
| Congestive heart failure | 21 (28%) | 69 (17%) | 0.05 |
| Smoking history | 37 (49%) | 146 (37%) | 0.06 |
| Myocardial infarction | 17 (22%) | 63 (16%) | 0.18 |
| Diabetes mellitus | 12 (16%) | 87 (22%) | 0.28 |
| Thyroid disease | 9 (12%) | 38 (10%) | 0.53 |
| Previous stroke | 13 (17%) | 62 (16%) | 0.73 |
| Rheumatic heart disease | 1 (1%) | 5 (1%) | 1.00 |
| Male gender (%) | 47 (62%) | 210 (53%) | 0.17 |
| Mean age, years (SD, range) | 70.0 (12.4, 25–95) | 72.0 (12.5, 21–94) | 0.22 |
*Based on Fisher’s exact test.
AFL, atrial flutter; AF, atrial fibrillation; SD, standard deviation.