Table 1.
Baseline Participant Characteristics in the Multi-Ethnic Study of Atherosclerosis by Incident Atrial Fibrillation within Five Years
| Atrial Fibrillation | |||
|---|---|---|---|
| Variables | No (n = 3410) |
Yes (n = 124) |
P Value |
| Age (years) | 60.9 (10.0) | 70.9 (7.3) | <0.001 |
| Men | 1646 (48%) | 70 (56%) | 0.09 |
| Non-Hispanic white | 1311 (38%) | 59 (48%) | |
| Chinese American Non-Hispanic black |
524 (15%) 762 (22%) |
14 (11%) 25 (20%) |
0.21 |
| Non-Hispanic black | 762 (22%) | 25 (20%) | |
| Hispanic | 813 (24%) | 26 (21%) | |
| Current smoker | 416 (12%) | 17 (14%) | 0.72 |
| Body mass index (kg/m2) | 27.5 (4.9) | 28.0 (4.8) | 0.36 |
| Systolic blood pressure (mm Hg) | 124.8 (21.1) | 133.3 (21.1) | <0.001 |
| Diastolic blood pressure (mm Hg) | 71.8 (10.2) | 71.2 (10.4) | 0.51 |
| Pulse pressure (mm Hg) | 53.0 (16.6) | 62.1 (17.4) | <0.001 |
| Antihypertensive medication use | 1118 (33%) | 64 (52%) | <0.001 |
| Diabetes mellitus | 380 (11%) | 13 (10%) | 0.93 |
| Coronary artery calcium (Agatston units) | |||
| 0 | 1812 (53%) | 32 (26%) | <0.001 |
| 1–99 | 885 (26%) | 39 (31%) | |
| 100–399 | 438 (13%) | 25 (20%) | |
| 400+ | 275 (8%) | 28 (23%) | |
| Ankle-brachial index | 1.12 (0.11) | 1.09 (0.16) | 0.002 |
| Common carotid intima-media thickness (mm) | 0.85 (0.18) | 0.95 (0.21) | <0.001 |
| Internal carotid intima-media thickness (mm) | 1.02 (0.56) | 1.27 (0.75) | <0.001 |
| Serum creatinine (mg/dL) | 0.96 (0.24) | 1.04 (0.29) | <0.001 |
| N-terminal pro-B-type natriuretic peptide (pg/mL) | 50.1 [22.0, 97.6] | 106.9 [51.3, 233.5] | <0.001 |
| Detectable cardiac troponin-T | 34 (1%) | 5 (4%) | 0.006 |
| R amplitude in lead V4 (uV) | 1429.8 (545.5) | 1478.5 (660.3) | 0.33 |
| STJ amplitude in lead V5 (uV) | 18.5 (35.3) | 8.37 (42.56) | 0.002 |
| Heart rate (beats per minute) | 62.7 (9.1) | 62.3 (10.7) | 0.64 |
| Heart rate variability (ms) | 22.6 (16.0) | 20.2 (15.2) | 0.10 |
| QRS axis (degrees) | 21.9 (31.4) | 12.1 (31.2) | 0.001 |
| End-systolic basal superior lateral wall thickness (mm) | 15.6 (3.0) | 16.4 (3.4) | 0.003 |
| End-systolic mid-ventricular anterior wall thickness (mm) | 15.9 (3.1) | 17.3 (3.7) | <0.001 |
Values are mean (standard deviation), median [interquartile range]