Table 1.
Patient demographics and clinical characteristics
| Characteristics | All patients (N=320) (%) |
Positive for ischaemia (n=26*) (%) |
Negative for ischaemia (n=292) (%) |
| Age (years), median (25th, 75th) | 51.0 (44.0, 59.5) | 56.0 (49.0, 63.0) | 50.0 (43.0, 59.0) |
| Sex | |||
| Male | 147 (45.9) | 12 (46.2) | 133 (45.5) |
| Female | 173 (54.1) | 14 (53.8) | 159 (54.5) |
| Race/Ethnicity | |||
| Hispanic or Latino | 15 (4.7) | 1 (3.8) | 14 (4.8) |
| Asian | 4 (1.3) | 0 (0) | 4 (1.4) |
| Black or African–American | 122 (38.1) | 10 (38.5) | 111 (38.0) |
| White/Caucasian | 188 (58.8) | 16 (61.5) | 171 (58.6) |
| Other | 6 (1.9) | 0 | 6 (2.1) |
| Hypertension | 155 (48.4) | 18 (69.2) | 136 (46.6) |
| Diabetes | 59 (18.4) | 5 (19.2) | 54 (18.5) |
| History of tobacco use | 118 (36.9) | 11 (44.0) | 106 (37.2) |
| Hyperlipidaemia | 105 (32.8) | 16 (61.5) | 89 (30.5) |
| Cocaine use | 21 (6.6) | 2 (8.0) | 19 (6.6) |
| Renal disease/insufficiency | 5 (1.5) | 2 (7.7) | 3 (1.0) |
| Past myocardial infarction | 7 (2.2) | 5 (19.2) | 2 (0.7) |
| Coronary artery disease | 16 (5.0) | 7 (26.9) | 9 (3.1) |
| History of coronary intervention | 10 (3.2) | 3 (11.5) | 7 (2.4) |
| Congestive heart failure | 5 (1.6) | 1 (3.8) | 4 (1.4) |
| Chief complaint: chest pain | 290 (90.6) | 24 (92.3) | 264 (90.4) |
| Peak pain score (median) | 7 | 7 | 6.9 |
| Duration of symptoms (median, min) | 2 | 1 | 2 |
| Pain description | |||
| Was your pain worse if you walk quickly, climb stairs or exert yourself? | 66 (20.6) | 3 (11.5) | 63 (21.6) |
| Was your pain worse if you take a deep breath or cough? | 75 (23.4) | 6 (23.1) | 69 (23.6) |
| Was your pain worse if you pressed on the chest wall? | 48 (15) | 3 (11.5) | 45 (15.4) |
| Associated symptoms? | |||
| Nausea or vomiting | 107 (33.4) | 10 (38.5) | 97 (33.2) |
| Dyspnoea | 136 (42.5) | 12 (46.2) | 123 (42.1) |
| Diaphoresis | 89 (27.8) | 11 (42.3) | 77 (26.4) |
| Syncope | 55 (17.2) | 1 (3.8) | 54 (18.5) |
*2 patients with indeterminate stress tests excluded.