Patient Characteristics (n = 480)
| Characteristic | Data |
| Age (y) | |
| Mean | 61.4 |
| Maximum | 87 |
| Minimum | 31 |
| Sex | |
| Male | 465 (96.9%) |
| Female | 14 (2.9%) |
| Body mass index | 33.0 ± 6.4 |
| Rest heart rate (bpm) | 70.5 ± 11.6 |
| Maximum heart rate (bpm) | 95.1 ± 13.8 |
| Rest blood pressure (mm Hg) | |
| Systolic | 141.6 ± 20.8 |
| Diastolic | 79.7 ± 12.2 |
| Stress blood pressure (mm Hg) | |
| Systolic | 117.7 ± 18.7 |
| Diastolic | 59.8 ± 11.6 |
| History of tobacco use | 192 (40.2%) |
| History of coronary artery disease | 186 (38.9%) |
| History of COPD | 68 (14.2%) |
| History of hypertension | 397 (83.1%) |
| History of diabetes mellitus | 213 (44.6%) |
| History of obesity | 315 (65.9%) |
| History of hyperlipidemia | 332 (69.5%) |
| Reversed | 6 (1.3%) |
| Clinical indications | |
| Chest pain | 227 (47.5%) |
| Shortness of breath | 30 (6.3%) |
| Risk factors | 170 (35.5%) |
| Preoperative | 6 (1.3%) |
| Abnormal ETT/ECG | 45 (9.4%) |
| Summed stress score | 6.5 ± 7.6 |
| Summed rest score | 2.3 ± 4.8 |
| Summed difference score | 3.9 ± 5.7 |
| Transient ischemic dilatation | 0.9 ± 0.1 |
| Stress ejection fraction | 59.9 ±11.6 |
| Resting ejection fraction | 55.1 ±11.1 |
| Difference in ejection fraction* | 4.7 ± 6.5 |
| ECG changes | |
| Nondiagnostic ECG changes | 411 (96.7%) |
| ≥1-mm ST segment depression | 12 (2.8%) |
↵* From rest to stress.
COPD = chronic obstructive pulmonary disease; ETT = exercise tolerance test; ECG = electrocardiogram.
Qualitative data are expressed as numbers, followed by percentages in parentheses; continuous data are expressed as mean ± SD.