Table 3. Clinical and demographic characteristics of the adult patients with cardiac arrest and 24-hour survival outcome, stratified according to arrest location and ultrasonographically detectable cardiac activity.

CPR: Cardiopulmonary resuscitation, USG: Ultrasonography, ROSC: Return of spontaneous circulation, * Statistically significant, α=0.01, ^a: Indicates statistically different group based on out of hospital, ^b: Indicates statistically different group based on in hospital