Table 1.
Baseline Participant Characteristics by baseline P-wave axis status Atherosclerosis Risk in Communities Study, 1987–1989
| Characteristic* | Normal PWA (n=13,849) | aPWA (n=1,253) | P-Value |
|---|---|---|---|
| Age, mean (SD), years | 54.1 (5.7) | 55.1 (5.8) | <0.0001 |
| Female | 7629 (55%) | 694 (55%) | 0.83 |
| Black race | 3669 (26%) | 309 (25%) | 0.16 |
| Current smoker | 3488 (25%) | 445 (36%) | <0.0001 |
| Body mass index, mean (SD) kg/m2 | 27.9 (5.3) | 25.0 (5.3) | <0.0001 |
| Diabetes | 1641 (12%) | 115 (9%) | 0.005 |
| Hypertension medications | 4246 (31%) | 308 (25%) | <0.0001 |
| Systolic blood pressure, mmHg mean, (SD) | 121.3 (18.7) | 120.4 (19.8) | 0.12 |
| Diastolic blood pressure, mmHg mean, (SD) | 73.9 (11.2) | 72.2 (11.9) | <0.0001 |
| Heart failure | 623 (5%) | 66 (5%) | 0.21 |
| Coronary heart disease | 638 (5%) | 73 (6%) | 0.05 |
| Use of anticoagulants | 53 (0.4%) | 20 (2%) | <0.0001 |
| Left ventricular hypertrophy | 300 (2%) | 27 (2%) | 0.98 |
*
Data are presented as no. (%) unless as otherwise stated
†
Abbreviations: P-wave axis (PWA), abnormal P-wave axis (aPWA), standard deviation (SD)