Table 1.
Baseline Study Characteristics
|
Cohort 1 (N=745) (Training Set) |
Cohort 2 (N=499) (Testing Set) |
|
|---|---|---|
| Demographics | ||
| Age in y | 59±17 | 59±16 |
| Sex (female) | 317 (42%) | 243 (49%) |
| Race (Black) | 301 (40%) | 202 (40%) |
| Past medical history | ||
| Hypertension | 519 (69%) | 329 (66%) |
| Diabetes mellitus | 196 (26%) | 132 (26%) |
| Old myocardial infarction | 205 (27%) | 122 (24%) |
| Known coronary artery disease | 248 (33%) | 179 (36%) |
| Known heart failure | 130 (17%) | 74 (15%) |
| Prior PCI/CABG | 207 (28%) | 124 (25%) |
| Clinical presentation | ||
| Chest pain | 665 (89%) | 454 (91%) |
| Shortness of breathing | 250 (34%) | 234 (47%) |
| Normal sinus rhythm | 648 (87%) | 442 (88%) |
| Atrial fibrillation | 71 (9%) | 46 (9%) |
| Course of hospitalization | ||
| Length of stay, median [interquartile range] | 2.3 [1.0–3.0] | 1.2 [0.6–2.5] |
| Confirmed ACS (all events) | 114 (15.3%) | 92 (18.4%) |
| Non−ST‐segment elevation‐ACS | 83 (11.1%) | 74 (14.8%) |
| Treated by primary PCI/CABG | 74 (10%) | 65 (13%) |
| 30‐d cardiovascular death | 33 (4.4%) | 24 (4.8%) |
ACS indicates acute coronary syndrome; CABG, coronary artery bypass graft; and PCI, primary percutaneous coronary intervention.