Survival by patient characteristics, bystander response, and LAS treatment for exercise SCA
| Variable | Died | Survived | |||
|---|---|---|---|---|---|
| N | Per cent | N | Per cent | ||
| Age | – | – | – | – | χ2=5.91, df=7, p=NS |
| Initial rhythm | χ2=17.49, df=2, p<0.001 | ||||
| VF/VT | 35 | 55 | 29 | 45 | |
| Asystole | 22 | 100 | 0 | 0 | |
| PEA | 8 | 89 | 1 | 11 | |
| Bystander CPR | χ2=3.25, df=1, p<0.1 | ||||
| Yes | 35 | 61 | 22 | 39 | |
| No | 30 | 79 | 8 | 21 | |
| Pre-LAS defibrillation | Fisher's exact test: p<0.05 | ||||
| Yes | 1 | 17 | 5 | 83 | |
| No | 64 | 72 | 25 | 28 | |
| LAS defibrillation | χ2=4.85, df=1, p<0.05 | ||||
| Yes | 43 | 61 | 27 | 39 | |
| No | 22 | 92 | 3 | 8 | |
| Advanced airway management* | χ2=24.03, df=1, p<0.001 | ||||
| Yes | 62 | 82 | 14 | 18 | |
| No | 3 | 18 | 14 | 82 | |
*Patient received intubation and/or a supraglottic airway; use of intubation was not recorded for two patients, these cases have been excluded from this analysis.
LAS, London Ambulance Service; PEA, pulseless electrical activity; SCA, sudden cardiac arrest; VF/VT, ventricular fibrillation/ventricular tachycardia.