Key result
Ambulance call delay ≤4 minutes in OHCA is linked to ~30% higher 1-month survival.
Why the study?
Does a shorter delay (≤4 min) from collapse to ambulance call improve survival in patients with bystander-witnessed out-of-hospital cardiac arrest?
Observational (n=9,340)
Yes
Does a shorter delay (≤4 min) from collapse to ambulance call improve survival in patients with bystander-witnessed out-of-hospital cardiac arrest?
Odds Ratio: 0.7 (95% CI 0.58–0.84)
Absolute Event Rate: 6.9% vs 2.8%
p-value: p=<0.0001
A shorter delay from collapse to calling an ambulance significantly increases one-month survival in patients with bystander-witnessed out-of-hospital cardiac arrest.
Early calls after witnessed out-of-hospital cardiac arrest were associated with higher survival; hypothesis-generating for public interventions pending prospective confirmation.
AIM: To describe the relative impact on survival of the delay from estimated time of collapse to call for an ambulance among patients who suffer from a bystander witnessed out of hospital cardiac arrest of a cardiac aetiology. METHODS: A majority of all ambulance organizations in Sweden (covering 85% of Sweden inhabitants) participate in a National survey of out of hospital cardiac arrest. RESULTS: In all there were 9340 patients with a bystander witnessed cardiac arrest of a cardiac aetiology in whom cardiopulmonary resuscitation (CPR) was attempted participating in this survey. Survival at one month among patients with a delay between estimated time of collapse and call for ambulance of < or =4 min (median) was 6.9% versus 2.8% among patients with a median of >4 min (P<0.0001). When adjusting for age, sex, initial rhythm, estimated interval between collapse and start of CPR, place of arrest and the interval between call for ambulance and arrival of the rescue team, the odds ratio for survival was 0.70 (0.95% CI. 0.58-0.84) per unit increase of the natural logarithm of delay in minutes between collapse and call. CONCLUSION: Among patients with a bystander witnessed out of hospital cardiac arrest of a cardiac aetiology increased delay from estimated time of collapse to call for an ambulance decreased the chance of survival.
No takes yet. Share an insight, caveat, or question.
Johan Herlitz (2003) conducted an observational in Out of hospital cardiac arrest (n=9,340). Delay from collapse to call for ambulance ≤4 min vs. Delay >4 min was evaluated on Survival at one month (OR 0.70, 95% CI 0.58-0.84, p=<0.0001). A delay of ≤4 minutes from collapse to calling an ambulance for out-of-hospital cardiac arrest was associated with higher 1-month survival compared to >4 minutes (6.9% vs 2.8%; P<0.0001).
Synapse has enriched 5 related papers. Consider them for comparative context: