Table 1.
Background characteristics and self-reported comorbidity of participants
| n (%) unless otherwise stated | Participants, n=74 | Missing data* |
| Age, median (min–max)† | 63 (25–89) | |
| Female† | 13 (18) | |
| Time to EMS in minutes, median (min– max) | 7 (1–61) | 11 |
| Cardiac arrest circumstances | ||
| Cardiac aetiology† | 62 (86) | 2 |
| Cardiac arrest at home | 22 (30) | |
| CPR before arrival of EMS | 41 (55) | |
| Initial rhythm: VF or VT | 61 (86) | 3 |
| Witnessed cardiac arrest | 69 (95) | 1 |
| In-hospital interventions | ||
| CABG | 5 (7) | 2 |
| ICD† | 19 (27) | 4 |
| Induced hypothermia (33°C)† | 35 (49) | 2 |
| PCI | 39 (54) | 2 |
| Comorbidity‡† | 60 (81) | |
| Anaemia or other blood disease | 0 | |
| Back pain | 3 (4) | |
| Cancer | 1 (1) | |
| Diabetes mellitus | 2 (3) | |
| Gastrointestinal disease | 5 (7) | |
| Heart disease | 54 (73) | |
| Hypertension | 27 (36) | |
| Liver disease | 1 (1) | |
| Osteoarthritis | 2 (3) | |
| Pulmonary disease | 3 (4) | |
| Renal disease | 0 | |
| Rheumatoid arthritis | 1 (1) | |
*Number of participants where information is missing.
†Variables included as predictors in the univariate regression analyses.
‡Number of participants with self-reported treatment-requiring comorbidity.
CABG, coronary artery bypass grafting; CPR, cardiopulmonary resurrection; EMS, emergency medical service; ICD, implantable cardioverter defibrillator; PCI, percutaneous coronary intervention; VF, ventricular fibrillation; VT ventricular tachycardia.