Table 1.
Characteristics of study population
| Without pre-OHCA diagnosed heart disease | With pre-OHCA diagnosed heart disease | P value | |
| n=1952 | n=1808 | ||
| Age in years, mean±SD | 64.7±14.0 | 71.4±12.6 | <0.001 |
| Male sex | 1379 (70.6) | 1289 (71.3) | 0.66 |
| Cardiovascular risk profile | |||
| Obesity | 311 (15.9) | 406 (22.5) | <0.001 |
| Hypertension | 824 (42.2) | 1073 (59.3) | <0.001 |
| Hypercholesterolemia | 498 (25.5) | 690 (38.2) | <0.001 |
| Stroke/transient ischaemic attack | 168 (8.6) | 319 (17.6) | <0.001 |
| Type 2 diabetes mellitus | 324 (16.6) | 520 (28.8) | <0.001 |
| Non-cardiac comorbidities | |||
| Depression | 138 (7.1) | 220 (12.2) | <0.001 |
| Chronic obstructive pulmonary disease | 283 (14.5) | 384 (21.2) | <0.001 |
| Cancer | 312 (16.0) | 378 (20.9) | <0.001 |
| Rheumatic disease | 79 (4.0) | 95 (5.3) | 0.08 |
| Renal dysfunction | 136 (7.0) | 400 (22.1) | <0.001 |
| Liver dysfunction | 73 (3.7) | 92 (5.1) | 0.13 |
| Resuscitation parameters | |||
| Witnessed arrest | 0.06 | ||
| By bystander | 1250 (64.0) | 1223 (67.6) | |
| By ambulance | 154 (7.9) | 135 (7.5) | |
| Bystander CPR provided | 1482 (75.9) | 1339 (74.1) | 0.19 |
| OHCA at home location | 1404 (71.9) | 1351 (74.7) | 0.053 |
| AED connected | 1101 (56.4) | 987 (54.6) | 0.26 |
| Shockable initial rhythm present | 849 (43.5) | 854 (47.2) | 0.021 |
| Time to defibrillator connection in min*, median (IQR) | 8.5 (6.5–11.0) | 8.5 (6.6–10.9) | 0.67 |
Results are presented as n (%) unless indicated otherwise.
*Time between emergency call and connection of AED or manual defibrillator.
AED, automated external defibrillator; CPR, cardiopulmonary resuscitation; OHCA, out-of-hospital cardiac arrest.