Patient Characteristics
| Parameter | Low likelihood (n = 64) | Training (n = 101) | Validation (n = 100) |
|---|---|---|---|
| Age (y) | 56 ± 11*† | 65 ± 12 | 64 ± 13 |
| Men | 33 (52%) | 65 (64%) | 63 (63%) |
| History of myocardial infarction | 0 (0%)*† | 35 (34.7%) | 31 (31%) |
| History of coronary angioplasty | 0 (0%)*† | 24 (23.8%) | 26 (26%) |
| History of bypass surgery | 0 (0%)*† | 10 (9.9%) | 12 (12%) |
| Diabetes mellitus | 1 (1.5%)*† | 17 (16.8%) | 11 (11%) |
| Hypertension | 0 (0%)† | 47 (64.5%) | 57 (57%) |
| Typical angina | 0 (0%)*† | 16 (15.8%) | 15 (15%) |
| Shortness of breath | 5 (7.8%) | 14 (13.9%) | 11 (11%) |
| Prescan likelihood of CAD | 0.02 ± 0.01*† | 0.63 ± 0.41 | 0.60 ± 0.40 |
| Summed stress score | 0.3 ± 1.0*† | 11 ± 11 | 9 ± 10 |
| Summed rest score | 0 ± 0*† | 5 ± 8 | 4 ± 8 |
| Summed difference score | 0.3 ± 1.0*† | 6 ± 8 | 5 ± 6 |
| Ejection fraction (%) | 66 ± 8*† | 46 ± 17 | 43_16 |