Table 1. Demographics.
| Demographics | All patients (n = 1954) |
AMI (n = 340) |
Other diagnoses (n = 1614) |
p value* |
|---|---|---|---|---|
| Age, years | 62 ± 16 | 69 ± 13 | 60 ± 16 | <0.001 |
| Male | 1341 (69) | 256 (75) | 1085 (67) | 0.004 |
| Risk factors | ||||
| Hypertension | 1247 (64) | 269 (79) | 978 (61) | <0.001 |
| Hyperlipidaemia | 992 (51) | 227 (67) | 765 (47) | <0.001 |
| Diabetes mellitus | 369 (19) | 92 (27) | 256 (16) | <0.001 |
| Current smoking | 500 (25) | 90 (27) | 386 (24) | 0.345 |
| History of smoking | 718 (38) | 141 (42) | 577 (36) | 0.051 |
| History | ||||
| Coronary artery disease | 710 (36) | 174 (51) | 536 (33) | <0.001 |
| Previous myocardial infarction | 474 (24) | 118 (35) | 356 (22) | <0.001 |
| Previous revascularisation (CABG or PCI) | 553 (28) | 127 (37) | 426 (26) | <0.001 |
| Peripheral artery disease | 119 (6) | 43 (13) | 76 (5) | <0.001 |
| Previous stroke | 100 (5) | 23 (7) | 77 (5) | 0.167 |
| Vital status | ||||
| Heart rate, beats/min | 79 ± 20 | 81 ± 20 | 79 ± 20 | 0.092 |
| Systolic blood pressure, mm Hg | 144 ± 24 | 145 ± 27 | 143 ± 24 | 0.421 |
| Diastolic blood pressure, mm Hg | 82 ± 15 | 81 ± 17 | 82 ± 15 | 0.299 |
| Electrocardiographic findings | ||||
| ST-segment depression | 193 (10) | 93 (28) | 100 (6) | <0.001 |
| T-wave inversion | 260 (13) | 82 (24) | 178 (11) | <0.001 |
| No significant electrocardiographic abnormalities | 1469 (75) | 161 (49) | 1308 (83) | <0.001 |
| Laboratory assessment | ||||
| Estimated glomerular filtration rate, ml/min/1.73m2† | 84 ± 26 | 74 ± 26 | 86 ± 25 | <0.001 |
| Presentation time | ||||
| Time since chest pain onset, hours | 5 [3, 12] | 5 [3, 12] | 5 [3, 12] | 0.898 |
| Time since chest pain peak, hours | 3 [2, 7] | 3 [2, 7] | 4 [2, 7] | 0.408 |
*
p values for comparison AMI group versus all other diagnoses; data are expressed as medians [1st quartile, 3rd quartile] or means ± standard deviation, for categorical variables as numbers (percentages);
AMI = Acute Myocardial Infarction; IQR = Interquartile Range; CABG = Coronary Artery Bypass Graft; PCI = Percutaneous Coronary Intervention;
†
glomerular filtration rate was estimated using the Modification of Diet in Renal Disease (MDRD) formula