Table 1.
Clinical characteristics of the study cohort stratified by presence or absence of chest pain or shortness of breath
| Clinical Characteristic | Total Cohort (n (%)) |
Symptoms (n (%)) |
Asymptomatic (n (%)) |
P-Value |
|---|---|---|---|---|
| Total patients | 575 | 409 | 166 | |
| Age (median (25th, 75th percentiles)) | 61 (53, 68) | 61 (53, 68) | 59 (52, 68) | 0.87 |
| Male | 295 (51.3) | 193 (47.2) | 102 (61.5) | 0.004* |
| Hypertension | 490 (85.2) | 346 (84.6) | 144 (86.8) | 0.51 |
| Hyperlipidemia | 431 (75.0) | 321 (78.5) | 110 (66.3) | 0.002* |
| Obesity (BMI ≥30)† | 383 (66.6) | 297 (72.6) | 86 (51.8) | <0.001* |
| Tobacco use | 163 (28.3) | 128 (31.3) | 35 (21.1) | 0.014* |
| Known coronary artery disease | 232 (40.3) | 160 (39.1) | 72 (43.4) | 0.35 |
| Prior myocardial Infarction | 134 (23.3) | 96 (23.5) | 38 (22.9) | 0.88 |
| Prior revascularization | 184 (32.0) | 130 (31.8) | 54 (33.1) | 0.76 |
| Medication usage | ||||
| ACE-inhibitor or ARB† | 372 (64.7) | 284 (69.4) | 88 (53.0) | <0.001* |
| Aspirin | 346 (60.7) | 259 (63.3) | 87 (54.0) | 0.041* |
| Beta-blocker | 322 (56.0) | 224 (54.8) | 98 (59.0) | 0.35 |
| Day of Test | 81 (14.1) | 53 (13.0) | 28 (16.9) | 0.22 |
| Clopidogrel | 44 (7.7) | 36 (8.8) | 8 (4.8) | 0.10 |
| Statin | 339 (59.0) | 257 (62.8) | 82 (50.9) | 0.009* |
| Insulin | 270 (47.0) | 187 (45.7) | 83 (50.0) | 0.37 |
| Oral hypoglycemic agent | 329 (57.2) | 256 (62.6) | 74 (44.6) | <0.001* |
*
ACE=angiotensin converting enzyme; ARB=Angiotensin receptor blocker; BMI=body-mass index.