Patient Characteristics, Investigated Predictors, and Univariate Analyses of Possible ACS Predictors
| Total | ACS | No ACS | Odds Ratio (95% CI) | P Value | |
|---|---|---|---|---|---|
| Mean age, y (SD) | 64 (13.3) | 67 (12.6) | 63 (13.3) | ||
| Male, n/N (%) | 127/243 (52.3) | 34/45 (75.6) | 93/198 (47.0) | 3.49 (1.67-7.28) | <.01 |
| Sex-adjusted age; female aged ≥65 y, male aged ≥55 y, n/N (%)a | 153/243 (63.0) | 36/45 (80.0) | 117/198 (59.1) | 2.77 (1.27-6.06) | .01 |
| Duration of symptoms, n/N (%) | |||||
| <1 h | 23/243 (9.5) | 3/45 (6.7) | 20/198 (10.1) | ||
| 1-24 h | 138/243 (56.8) | 23/45 (51.1) | 115/198 (58.1) | ||
| >24 h | 82/243 (33.7) | 19/45 (42.2) | 63/198 (31.8) | ||
| FP immediately suspected a serious condition, n/N (%) | 120/243 (49.4) | 26/45 (57.8) | 94/198 (47.5) | 1.51 (0.79-2.91) | .21 |
| History of clinical vascular disease, n/N (%)a | 106/243 (43.6) | 22/45 (48.9) | 84/198 (42.4) | 1.30 (0.68-2.48) | .43 |
| Patient assumes cardiac origin of pain, n/N (%)a | 136/242 (56.2) | 28/45 (62.2) | 108/197 (54.8) | 1.36 (0.70-2.64) | .37 |
| Chest pain, n/N (%) | 215/243 (88.5) | 39/45 (86.7) | 176/198 (88.9) | 0.81 (0.31-2.14) | .67 |
| Pain worse with exercise, n/N (%)a | 86/188 (45.7) | 17/36 (47.2) | 69/152 (45.4) | 1.08 (0.52-2.23) | .84 |
| Pain feels like pressure, n/N (%) | 185/212 (87.3) | 31/39 (79.5) | 154/173 (89.0) | 0.48 (0.19-1.19) | .11 |
| Pain not reproducible by palpation, n/N (%)a | 179/210 (85.2) | 36/39 (92.3) | 143/171 (83.6) | 2.35 (0.68-8.16) | .17 |
| ECG performed, n/N (%) | 115/239 (48.1) | 23/44 (52.3) | 92/195 (47.2) | ||
| ECG shows ischemic changes, n/N (%) | 37/115 (32.2) | 17/23 (73.9) | 20/92 (21.7) | 10.20 (3.55-29.28) | <.01 |
| FP assessment of ACS probability, median (IQR) | 6 (3) | 7 (3) | 6 (3) | ||
| Marburg Heart Score,b median (IQR) | 3 (2) | 4 (2) | 3 (2) |