Table 1.
Clinical characteristics of patients with and without angina during dobutamine stress echocardiography (DSE)
| Silent ischaemia (n = 643) | Symptomatic ischaemia (n = 288) | p Value | |
| Age (years)* | 61 (13) | 61 (11) | 0.6 |
| Men | 465 (72%) | 233 (81%) | 0.009 |
| Previous infarction | 330 (51%) | 161 (56%) | 0.2 |
| Diabetes mellitus | 78 (12%) | 29 (10%) | 0.4 |
| Hypertension | 195 (30%) | 79 (27%) | 0.4 |
| Hypercholesterolaemia | 163 (25%) | 82 (28%) | 0.3 |
| Smoking | 122 (19%) | 88 (30%) | 0.3 |
| History of angina | 200 (31%) | 196 (68%) | <0.001 |
| History of heart failure | 107 (17%) | 38 (13%) | 0.2 |
| Previous coronary angiography | 219 (34%) | 112 (39%) | 0.2 |
| Previous coronary bypass surgery | 96 (15%) | 43 (15%) | 1 |
| Previous coronary angioplasty | 89 (14%) | 56 (19%) | 0.04 |
| β Blockers | 243 (38%) | 115 (40%) | 0.5 |
| Calcium channel blockers | 177 (27%) | 99 (34%) | 0.04 |
| Nitrates | 180 (28%) | 115 (40%) | 0.001 |
| Aspirin | 302 (47%) | 158 (55%) | 0.005 |
| Statins | 174 (27%) | 92 (32%) | 0.01 |
| Indication for DSE | |||
| Diagnosis of CAD | 350 (54%) | 211 (73%) | <0.0001 |
| Preoperative evaluation before non-cardiac surgery | 186 (29%) | 34 (12%) | <0.0001 |
| Risk stratification after MI | 107 (17%) | 43 (15%) | 0.6 |
*Mean (SD).
CAD, coronary artery disease; MI, myocardial infarction.