Abstract 212: Advantage of CPR-First Over Call-First Basic Life Support Actions in Out-of-Hospital Cardiac Arrest of Noncardiac Etiology and Young Adults/Children

Aim: To assess the benefit of immediate call-first or CPR-first basic life support (BLS) in promoting a better outcome of out-of-hospital cardiac arrest (OHCA). Methods: From the nation-wide database of 2005 to 2012, we extracted bystander-witnessed OHCAs in which both emergency call and CPR were performed by bystanders on their own initiative (without instruction over telephone) within 6 min of witnessing patient collapse. These cases were categorized into the following four groups; immediate Call+CPR group (N=10,195 ,emergency call and/or CPR within 2 min of witness, call-CPR time interval = 0 or 1 min), immediate Call-First group (N=1,820 , emergency call within 2 min of witness, call-CPR interval = 2[[Unable to Display Character: ‒]]4 min), immediate CPR-First group (N=5,446 , bystander CPR within 2 min of witness, CPR-call interval =2[[Unable to Display Character: ‒]]4 min), the delayed Call/CPR group (N=4,671, the remaining cases). We compared the rates of neurologically favorable surviv...