Table 1 Characteristics of the study population at baseline examination by spatial T wave axis extreme quartiles. The ARIC Study. Mean (SD) and percentages
From: The association of spatial T wave axis deviation with incident coronary events. The ARIC cohort
| Â | Women, n = 7143 | Men, n = 5133 | ||
|---|---|---|---|---|
Variable (units) | Spatial T wave axis deviation quartile | |||
|  | T axis quartile 1: 0.33–14.75° | T axis quartile 4: 30.20–60.76° | T axis quartile 1: 0.19–16.19° | T axis quartile 4: 30.41–60.88° |
Age (years) | 53.5 (5.7) | 53.7 (5.6) | 54.4 (5.7) | 54.4 (5.7) |
African-American % | 18.4 | 41.7 | 13.0 | 32.1 |
Height (cm) | 162.3 (5.9) | 161.9 (6.0) | 176.5 (6.2) | 175.5 (6.7) |
Weight (Lb) | 151.7 (32.5) | 168.6 (37.8) | 182.3 (30.8) | 190.6 (31.8) |
BMI (kg/m*m) | 26.2 (5.4) | 29.2 (6.3) | 26.6 (4.1) | 28.1 (4.3) |
WHR | 0.88 (0.08) | 0.90 (0.08) | 0.96 (0.06) | 0.96 (0.05) |
Smokers % | 26 | 21 | 32 | 29 |
SBP (mmHg) | 116.8 (18.2) | 122.9 (19.4) | 118.8 (15.5) | 126.1 (18.5) |
DBP (mmHg) | 70.3 (10.3) | 74.2 (11.1) | 73.3 (9.8) | 78.2 (11.6) |
HTN % | 25 | 43 | 22 | 44 |
Glucose (mmol/L) | 5.8 (2.3) | 6.1 (2.5) | 5.8 (1.4) | 6.2 (2.3) |
Diabetes % | 8 | 13 | 7 | 14 |
HDL-C (mmol/L) | 1.5 (0.4) | 1.5 (0.4) | 1.2 (0.4) | 1.2 (0.4) |
LDL-C (mmol/L) | 3.5 (1.0) | 3.6 (1.0) | 3.6 (1.0) | 3.6 (1.0) |
Total Cholesterol (mmol/L) | 5.6 (1.1) | 5.7 (1.1) | 5.4 (1.0) | 5.5 (1.0) |
Tri-glyc. (mmol/L) | 1.3 (0.8) | 1.4 (1.0) | 1.6 (1.2) | 1.7 (1.1) |
QRS axis (degrees) | 52.5 (30.0) | 32.8 (32.0) | 52.1 (34.3) | 24.0 (35.9) |
Cornell voltage (uV) | 926.1 (400.6) | 1188.9 (437.4) | 1165.6 (44.7) | 1489.8 (490.6) |
QT interval (ms) | 394.2 (27.4) | 403.9 (28.3) | 395.0 (29.2) | 400.1 (29.8) |
Heart rate (bpm) | 70.2 (9.8) | 67.7 (9.9) | 62.3 (10.3) | 66.7 (10.1) |
QTc (ms) | 399.2 (18.5) | 403.9 (19.1) | 415.0 (16.4) | 418.5 (18.7) |
T axis frontal plane (degrees) | 61.5 (12.3) | 38.3 (25.4) | 62.2 (12.5) | 31.4 (26.8) |
Minor T wave abn.% | 5.3 | 16.4 | 3.8 | 16.8 |