Prespecified risk factors for physical death or poor inhospital outcome will be group (Intervention vs. Control); cardiac arrest cause (cardiac vs. non-cardiac); cardiac arrest area (monitored vs. non-monitored), initial cardiac arrest rhythm (shockable vs. non-shockable); cardiac arrest time (i.e. weekday vs. holiday and nighttime vs. morning-to-late evening), advanced life support (ALS)-related bicarbonate dose; time from resuscitation team call to ALS initiation plus ALS duration; and therapeutic hypothermia (yes vs. no).