Table 1.
Patient characteristics
| Patients without APCs (n=10 956) | Patients with APCs | ||||
| Negative P wave in aVR (n=39) | Non-negative P wave in aVR (n=97) | Positive P wave in aVL (n=28) | Non-positive P wave in aVL (n=108) | ||
| Age (years) | 55.6±11.2 | 64.9±8.0*** | 63.7±9.6*** | 65.9±8.7*** | 63.6±9.3*** |
| Male (%) | 38 | 44 | 40 | 43 | 41 |
| Height (cm) | 155±9 | 153±9 | 153±8 | 151±8 | 153±8 |
| Body mass index (kg/m2) | 23.1±3.1 | 21.9±2.6* | 22.6±2.9 | 22.5±3.0 | 22.4±2.8* |
| Current smoker (%) | 21 | 23 | 21 | 32 | 19 |
| Current drinker (%) | 44 | 39 | 33 | 36 | 34 |
| Hypertension (%) | 17 | 24 | 27* | 48* | 20** |
| Diabetes (%) | 4 | 3 | 4 | 4 | 4 |
| Prior stroke (%) | 1 | 0 | 3 | 4 | 2 |
| Prior MI (%) | 1 | 5*** | 1 | 4 | 2 |
| Systolic BP (mm Hg) | 130±21 | 131±22 | 136±20* | 142±26** | 132±19 |
| Diastolic BP (mm Hg) | 78±12 | 74±15 | 79±12 | 81±13 | 77±13 |
| Total cholesterol (mg/dL) | 193±35 | 195±38 | 188±36 | 195±34 | 188±38 |
| HDL-cholesterol (mg/dL) | 51±13 | 52±16 | 52±14 | 54±16 | 51±14 |
*P<0.05, **P<0.01, ***P<0.001 versus patients without APCs.
APC, atrial premature complex; aVL, augmented vector left; aVR, augmented vector right; BP, blood pressure; HDL, high-density lipoprotein; MI, myocardial infarction.