18 Location of Arrest The most common place for an OHCA to occur is in a residential setting, with 69.9% of events occurring in a home. Other common arrest locations were nursing home (11.4%), public or commercial building (7.2%), street or highway (5.4%), and healthcare facility (3.5%) (Figure 6). The location of an OHCA is highly correlated with bystander intervention and patient outcome. In comparison to residential arrests, patients who arrested in a public setting were far more likely to have a bystander witnessed event and receive bystander CPR prior to EMS arrival (Figure 7). Patient outcomes were also significantly different across incident locations, with public arrests having a nearly 2.5-fold rate of survival to hospital discharge compared to residential arrests (21.5% vs 8.7%, respectively; p< .0001). Figure 6. Location of arrest. Figure 7. Percentage of events that are bystander witnessed, receive bystander CPR, and survive to hospital discharge by arrest location.