Table 1.
Baseline Characteristics of the Study Population
| Characteristics | White n = 2507 |
African American n = 1822 |
Hispanic n = 1447 |
Chinese n = 775 |
P-Value |
|---|---|---|---|---|---|
| Age (years) | 62.49 ± 10.21 | 62.07 ± 10.04 | 61.2 ± 10.32 | 62.28 ± 10.32 | .002 |
| Females | 1320 (52.7) | 1026 (56.3) | 754 (52.1) | 407 (52.5) | .047 |
| Smoker | |||||
| Never | 1105 (44.2) | 821 (45.4) | 786 (54.3) | 586 (75.7) | <.001 |
| Former | 1109 (44.3) | 664 (36.7) | 462 (31.9) | 143 (18.5) | <.001 |
| Current | 288 (11.5) | 323 (17.9) | 199 (13.8) | 45 (5.8) | <.001 |
| Total cholesterol (mg/dL) | 195.85 ± 34.93 | 189.99 ± 36.14 | 197.92 ± 37.61 | 192.92 ± 31.45 | <.001 |
| LDL cholesterol (mg/dL) | 117.16 ± 30.09 | 116.64 ± 32.98 | 119.6 ± 32.91 | 115.32 ± 28.92 | .01 |
| HDL cholesterol (mg/dL) | 52.4 ± 15.69 | 52.53 ± 15.25 | 47.76 ± 13.09 | 49.63 ± 12.65 | <.001 |
| Triglycerides (mg/dL) | 132.81 ± 90.62 | 104.85 ± 68.94 | 156.04 ± 101.2 | 142.76 ± 84.91 | <.001 |
| Body mass index (kg/m2) | 27.73 ± 5.07 | 30.21 ± 5.87 | 29.42 ± 5.09 | 23.95 ± 3.3 | <.001 |
| Hypertension | 957 (38.2) | 1079 (59.2) | 594 (41.1) | 286 (36.9) | <.001 |
| Systolic blood pressure | 123.4 (20.4) | 131.52 (21.5) | 126.6 (21.8) | 124.53 (21.6) | <.001 |
| Diastolic blood pressure | 70.23 (10.0) | 74.37 (10.2) | 71.48 (10.1) | 71.89 (10.3) | <.001 |
| Diabetes mellitus | 148 (5.9) | 313 (17.3) | 253 (17.5) | 102 (13.2) | <.001 |
| QRS axis | 20.97 ± 32.53 | 15.95 ± 30.17 | 15.21 ± 29.51 | 31.54 ± 31.7 | <.001 |
| Abnormal QRS axis | 177 (7.1) | 125 (6.86) | 87 (6.01) | 31 (4) | .016 |
| Left ventricular hypertrophy | 146 (5.8) | 112 (6.2) | 77 (5.3) | 46 (5.9) | .79 |
| ST/T abnormalities | |||||
| Any ST/T abnormalities | 261 (10.4) | 343 (18.8) | 202 (14.0) | 91 (11.7) | <.001 |
| Minor ST/T abnormalities | 224 (8.9) | 315 (17.3) | 188 (13.0) | 77 (9.9) | <.001 |
| Major ST/T abnormalities | 76 (3.0) | 112 (6.2) | 47 (3.3) | 33 (4.3) | <.001 |
HDL = high-density lipoprotein;LDL = low-density lipoprotein.
*
Values are expressed as mean ± SD or number (%).