Table. Baseline Characteristics and Survival Among Patients With OHCAs in Denmark According to Location and Whether Bystander Defibrillation Was Performeda.
| Variable | Location of OHCA | All (n = 18 688) |
Missing Data | |||
|---|---|---|---|---|---|---|
| Residential | Public | |||||
| Bystander Defibrillation (n = 117) |
No Bystander Defibrillation (n = 13 788) |
Bystander Defibrillation (n = 243) |
No Bystander Defibrillation (n = 4540) |
|||
| Age, median (IQR), y | 68 (58-77) | 73 (63-81) | 64 (53-73) | 68 (58-78) | 72 (62-80) | 0 |
| Males | 84 (71.8) | 8913 (64.6) | 220 (90.5) | 3459 (76.2) | 12 676 (67.8) | 0 |
| OHCA characteristics | ||||||
| Bystander CPR | 99 (84.6) | 4377 (31.8) | 229 (94.2) | 2428 (53.6) | 7133 (38.2) | 47 |
| Bystander-witnessed arrest | 82 (70.1) | 6475 (47.2) | 203 (83.5) | 2999 (66.5) | 9759 (52.2) | 103 |
| Shockable heart rhythm | 117 (100) | 2859 (21.6) | 243 (100) | 1976 (45.0) | 5195 (27.8) | 722 |
| Time interval, median (IQR), minb | 15.0 (10.0-21.0) | 12.0 (7.0-20.0) | 13.0 (8.0-17.0) | 10.0 (6.0-15.0) | 11.0 (7.0-19.0) | 1771 |
| Comorbidity | ||||||
| Ischemic heart disease (MI not included) | 36 (30.8) | 3597 (26.1) | 59 (24.3) | 1111 (24.5) | 4803 (25.7) | 0 |
| Previous MI | 16 (13.7) | 1747 (12.7) | 36 (14.8) | 531 (11.7) | 2330 (12.5) | 0 |
| Heart failure | 29 (24.8) | 2987 (21.7) | 42 (17.3) | 823 (18.1) | 3881 (20.8) | 0 |
| COPD | 14 (12.0) | 2239 (16.2) | 6 (2.5) | 422 (9.3) | 2681 (14.3) | 0 |
| Malignant disease | 13 (11.1) | 1698 (12.3) | 15 (6.2) | 406 (8.9) | 2132 (11.4) | 0 |
| Renal disease | 2 (1.7) | 715 (5.2) | 6 (2.5) | 153 (3.4) | 876 (4.7) | 0 |
| Survival | ||||||
| ROSC at hospital arrival | 42 (37.2) | 1702 (12.6) | 133 (56.4) | 1121 (25.1) | 2998 (16.0) | 347 |
| 30-d Survival | 23 (19.7) | 660 (4.8) | 114 (46.9) | 676 (14.9) | 1473 (7.9) | 0 |
Abbreviations: COPD, chronic obstructive pulmonary disease; CPR, cardiopulmonary resuscitation; IQR, interquartile range; MI, myocardial infarction; OHCA, out-of-hospital cardiac arrest; ROSC, return of spontaneous circulation.
a
Data are presented as number (percentage) of patients unless otherwise indicated. Data were collected from June 1, 2001, to December 31, 2012.
b
Indicates estimated time from recognition of the arrest to the first rhythm analysis by the emergency medical services personnel.