Table 1.
Age and other factors at resuscitation
| Cardiac arrest at home | ||||
| Factor | Missing* | Yes (n=16 150) | No (n=8480) | p Value |
| Sex (n (%)) | 722, 373 | |||
| Male | 10 702 (69.4) | 6259 (77.2) | <0.0001 | |
| Female | 4726 (30.6) | 1848 (22.8) | ||
| Age (years) | 316, 660 | |||
| Mean (SD) | 68.1 (15.9) | 65.9 (17.1) | 0.003 | |
| Range | 0–99 | 0–99 | ||
| Witnessed arrest (n (%)) | 1527, 827 | 8847 (60.5) | 5265 (68.8) | <0.0001 |
| Bystander CPR (n (%)) | 802, 343 | 4296 (28.0) | 3942 (48.4) | <0.0001 |
| Initial arrhythmia (n (%)) | 1700, 967 | |||
| VF | 3809 (26.4) | 3232 (43.0) | <0.0001 | |
| †Interval (min) between cardiac arrest and: | ||||
| Call for ambulance | 1666, 803 | |||
| Median | 5 | 4 | ||
| Mean (SD) | 6.4 (19.5) | 5.3 (22.2) | 0.006 | |
| Start of CPR | 2094, 1166 | |||
| Median | 12 | 8 | ||
| Mean (SD) | 14.5 (32.8) | 10.1 (30.7) | <0.0001 | |
| Arrival of ambulance | 1830, 934 | |||
| Median | 12 | 10 | ||
| Mean (SD) | 15.2 (36.4) | 13.0 (29.9) | <0.0001 | |
| First defibrillation (if in VF) | 498, 413 | |||
| Median | 13 | 11 | ||
| Mean (SD) | 14.9 (26.3) | 13.3 (23.7) | <0.0001 | |
| ‡Interval (min) between call for ambulance and: | ||||
| Arrival of ambulance | 645, 422 | |||
| Median | 6 | 5 | ||
| Mean (SD) | 8.8 (22.6) | 8.1 (21.5) | 0.009 | |
| First defibrillation (if in VF) | 251, 247 | |||
| Median | 9 | 7 | ||
| Mean (SD) | 10.7 (20.8) | 9.7 (24.8) | NS | |
*Number of patients in the two categories with missing information.
†Only witnessed cases included.
‡All cases included.
CPR, cardiopulmonary resuscitation; VF, ventricular fibrillation.