Table 1.
Baseline characteristics for patients suspected of myocardial infarction triaged by use of electrocardiogram-based telemedicine (n = 17,398). Stratified according to symptom/condition leading to telemedical triage
| Chest pain | Dyspnea | Cardiac arrest | Other | ||||||
|---|---|---|---|---|---|---|---|---|---|
| (n = 12,230) | (n = 1464) | (n = 164) | (n = 3540) | ||||||
| Variables | No (%) | Valid cases | No (%) | Valid cases | No (%) | Valid cases | No (%) | Valid cases | p |
| Demographics | |||||||||
| Age, median (IQR), y | 65 (53–76) | 12,230 | 76 (65–84) | 1464 | 67 (57–79) | 163 | 71 (59–81) | 3540 | <0.001 |
| Sex (male) | 7061 (58) | 12,230 | 760 (52) | 1464 | 114 (70) | 163 | 2098 (59) | 3540 | <0.001 |
| Charlson comorbidity index group | 12,230 | 1464 | 163 | 3540 | |||||
| 0 | 6296 (51) | 483 (33) | 90 (55) | 1638 (46) | <0.001 | ||||
| 1–2 | 4016 (33) | 517 (35) | 57 (35) | 1235 (35) | <0.001 | ||||
| 3–4 | 1274 (10) | 279 (19) | 11 (7) | 441 (12) | <0.001 | ||||
| ≥5 | 644 (5) | 185 (13) | 6 (4) | 226 (6) | <0.001 | ||||
| Clinical parameters | |||||||||
| Blood pressure | |||||||||
| Systolic, median (IQR), mmHg | 146 (129–166) | 11,449 | 148 (128–170) | 1362 | 129 (107–148) | 124 | 138 (120–158) | 3240 | <0.001 |
| Diastolic, median (IQR), mmHg | 88 (77–99) | 11,411 | 87 (74–102) | 1361 | 83 (66–102) | 123 | 82 (70–94) | 3231 | <0.001 |
| Heart Rate, median (IQR), beats/min | 82 (70–98) | 11,451 | 95 (80–116) | 1373 | 92 (76–105) | 127 | 82 (67–101) | 3242 | <0.001 |
Binary data are compared using chi-squared test, continuous data are compared using Kruskal Wallis test