Factors associated with the clinical outcomes of adult cardiac and non-cardiac origin cardiac arrest in emergency departments: a nationwide retrospective cohort study from China.

Cardiac arrest(CA)is one of the most common causes of death.[1-3]Despite extensive studies on the management of CA,the global survival rate in adults is only approximately 7％,and 30-day survival is even less than 2％in China.[4]Some studies have shown that CA patients of cardiac and non-cardiac origin may differ in underlying diseases,clinical manifestations,and prognosis,which leads to differences in terms of the pathophysiological mechanism and treatment measure.[5,6]However,little is known about the risk factors in relation to the prognosis of CA across arrest etiologies.