Baseline characteristics by sex and age group
| All patients, (n=1506) | Women, (n=597) | Men, (n=909) | P value | Age <70, (n=1039) | Age ≥70, (n=467) | P value | |
| Baseline characteristics | |||||||
| Age, years | 62.3±33.1 | 65.1±28.6 | 60.4±35.2 | <0.001 (T) | 54.6±20.9 | 79.3±29.5 | <0.001 (T) |
| Symptom to arrival time, hours | 8.6 (3.1–52.7) | 8.6 (2.8–51.2) | 8.9 (3.2–56.25) | 0.266 (W) | 9.1 (3.1–55.0) | 8.3 (3.1–50.8) | 0.449 (W) |
| Hospital stay, hours | 28.0 (22–69) | 26.0 (22–50) | 32.0 (22–73) | <0.001 (W) | 26.0 (21–62) | 44.0 (24–78) | <0.001 (W) |
| Acute MI | 175 (11.6) | 53 (8.9) | 122 (13.4) | 0.007 (C) | 99 (9.5) | 76 (16.3) | <0.001 (C) |
| Risk factors | |||||||
| Hypertension, % | 616 (40.9) | 266 (44.6) | 350 (38.5) | 0.019 (C) | 337 (32.4) | 279 (59.7) | <0.001 (C) |
| Hyperlipidaemia, known % | 303 (20.1) | 121 (20.3) | 182 (20.0) | 0.907 (C) | 193 (18.6) | 110 (23.6) | 0.026 (C) |
| Hyperlipidaemia, new,* % | 142 (9.4) | 71 (11.9) | 71 (7.8) | 0.008 (C) | 98 (9.4) | 44 (9.4) | 0.995 (C) |
| Diabetes mellitus, % | 181 (12.0) | 62 (10.4) | 119 (13.1) | 0.114 (C) | 105 (10.1) | 76 (16.3) | 0.001 (C) |
| Insulin-dependent | 51 (3.4) | 18 (3.0) | 33 (3.6) | 0.518 (C) | 26 (2.5) | 25 (5.4) | 0.005 (C) |
| Family history, % | 275 (18.3) | 117 (19.6) | 158 (17.4) | 0.276 (C) | 224 (19.8) | 51 (10.9) | <0.001 (C) |
| Current smoker, % | 284 (18.9) | 118 (19.8) | 166 (18.3) | 0.466 (C) | 206 (19.8) | 78 (16.7) | 0.152 (C) |
| Previous smoker, % | 658 (43.7) | 248 (41.5) | 410 (45.1) | 0.173 (C) | 445 (42.8) | 213 (45.6) | 0.314 (C) |
| Medical history | |||||||
| Prior MI, % | 289 (19.2) | 76 (12.7) | 213 (23.4) | <0.001 (C) | 141 (13.6) | 148 (31.7) | <0.001 (C) |
| Prior PCI, % | 293 (19.5) | 73 (12.2) | 220 (24.2) | <0.001 (C) | 159 (15.3) | 134 (28.7) | <0.001 (C) |
| Prior CABG, % | 111 (7.4) | 18 (3.0) | 93 (10.2) | <0.001 (C) | 45 (4.3) | 66 (14.1) | <0.001 (C) |
| Heart failure, % | 52 (3.4) | 18 (3.0) | 34 (3.7) | 0.451 (C) | 20 (1.9) | 32 (6.9) | <0.001 (C) |
| Stroke, % | 42 (2.8) | 12 (2.0) | 30 (3.3) | 0.137 (C) | 17 (1.6) | 25 (5.4) | <0.001 (C) |
| Peripheral vascular disease, % | 29 (1.9) | 9 (1.5) | 20 (2.2) | 0.339 (C) | 11 (1.1) | 18 (3.9) | <0.001 (C) |
| Vital parameters at admission | |||||||
| Systolic BP, mm Hg | 145.9±41.0 | 147.2±47.3 | 143.8±40.1 | 0.003 (T) | 142.9±41.0 | 150.1±46.4 | <0.001 (T) |
| Diastolic BP, mm Hg | 84.3±25.3 | 81.5±26.7 | 85.4±24.9 | <0.001 (T) | 85.2±24.6 | 80.8±27.5 | <0.001 (T) |
| Heart rate, bpm | 72.7±32.9 | 75.9±32.3 | 74.2±38.1 | 0.069 (T) | 74.1±31.0 | 76.6±25.0 | 0.012 (T) |
| BMI† | 27.4±9.2 | 26.4±9.6 | 28.0±8.8 | <0.001 (T) | 28.0±9.4 | 26.2±8.3 | <0.001 (T) |
| ECG findings | |||||||
| ST segment depression, % | 47 (3.1) | 22 (3.7) | 25 (2.8) | 0.307 (C) | 21 (2.0) | 26 (5.6) | <0.001 (C) |
| T-wave inversion, % | 47 (3.1) | 18 (3.0) | 29 (3.2) | 0.848 (C) | 33 (3.2) | 14 (3.0) | 0.854 (C) |
Values are median (IQR), mean±2 SD, or n (%).
*Total cholesterol ≥6.5 ng/L at presentation.
†Data missing in 50.6% (762/1506).
BMI, body mass index; BP, blood pressure; C, chi-square; CABG, coronary artery bypass grafting; FE, Fischer's exact; MI, myocardial infarction; PCI, percutaneous coronary intervention; T, two-sample t-test; W, Wilcoxon.