Figure 3. Adjusted odds ratios for favorable 30‐day neurological outcome after out‐of‐hospital shockable cardiac arrest stratified by witnessed status.

A, Bystander, (B) EMS‐responder. Data for multivariable logistic regression analysis were available for 88.8% (54 244/61 080) of the bystander‐witnessed cardiac arrest cases and 89.2% (11 142/12 498) of the EMS‐responder‐witnessed cardiac arrest cases. CoSTR indicates international consensus on cardiopulmonary resuscitation and emergency cardiovascular care science with treatment recommendations; CPR, cardiopulmonary resuscitation; and EMS, emergency medical service.