Cardiac arrest & resuscitation

Presentation and Outcomes of Adults With Overdose-Related Out-of-Hospital Cardiac Arrest

JAMA Netw OpenPublished Population-based cohort study

Authors' conclusion

In a population-based cohort study, the incidence of OD-OHCA increased significantly from 2015 to 2021, with the greatest increase observed among patients with a combined stimulant-opioid OHCA. Presentation and outcome differed according to the drug-specific profile.

Study context

Population
Adults with EMS-treated Out-of-hospital Cardiac Arrest (OHCA), King County Washington, 2015–2021EMS-treated OHCA
Participants
6,790 adults
Exposure
OD-OHCA vs non-OD OHCA
  • Overdose (OD)n = 702
  • non-ODn = 6,088reference
Outcome
Survival to hospital discharge

Main finding

As reported in the abstract

Observational data: associations, not effects.

Secondary outcomes

OutcomeValues
Unwitnessed arrestOD-OHCA 66% · non-OD OHCA 41%
Shockable rhythmOD-OHCA 8% · non-OD OHCA 25% · Stimulant-only 24% · Opioid-only 4% · Opioid-stimulant 5%
Witnessed arrest (drug profiles)Stimulant-only 50% · Other drugs 19% · Opioid-stimulant 23%

Incidence of OD-OHCA (per 100 000 person-years) · 2015 to 2021

Incidence 2015
5.2 (95% CI, 3.8-6.6)
Incidence 2021
13.0 (95% CI, 10.9-15.1)
Trend
P < 0.001
No significant temporal change in non-OD OHCA incidence
P = 0.30
Greatest relative increase in combined opioid-stimulant OHCA

Original publication

Presentation and Outcomes of Adults With Overdose-Related Out-of-Hospital Cardiac Arrest. JAMA Netw Open. Published 1 November 2023. doi:10.1001/jamanetworkopen.2023.41921

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