b'2024 DATASETFigure 5 further highlights the relationship between arrest etiology and patient age. Presumed cardiac cause was the most predominant etiology across all age groups, with the proportion of arrests attributable to this cause increasing with patient age. However, pediatric patients were much more likely than adults to experience an arrest due to respiratory cause. Drug overdose accounted for 31.3% of arrests in the 19-34 age group and 16.8% of arrests in the 35-49 age group, highlighting the continued impact of the opioid epidemic in the United States.Figure 5. Etiology of arrest by age group.LOCATION OF ARRESTThe most common location for an OHCA to occur is in a residential setting, with 71.3% of events occurring in a home. Other common arrest locations included nursing home (10.7%), public or commercial building (7.4%), street or highway (4.9%), and healthcare facility (3.1%) (Figure 6).The location of an OHCA is highly correlated with bystander intervention and patient outcome. Compared to residential arrests, incidents in a public setting are more likely to be witnessed by a bystander and receive bystander CPR prior to EMS arrival (Figure 7). Patient outcomes also vary significantly by location, with public arrests having an approximately 2.4-fold higher rate of survival to hospital discharge compared to residential arrests (21.1% vs 8.9%, respectively; p .0001). Figure 6. Location of Arrest34'