Sustained ROSC ( emergency department admittance ) , 24h survival and hospital discharge ( unknown for 12 cases ) for iA-CPR compared to M-CPR were 600 ( 28.6 % ) vs. 689 ( 32.3 % ) , 456 ( 21.8 % ) vs. 532 ( 25.0 % ) , 196 ( 9.4 % ) vs. 233 ( 11.0 % ) patients , respectively .