Cardiac arrest & resuscitation

Age and sex differences in the sensitivity of ICD-10 diagnostic codes for identifying patients with out-of-hospital cardiac arrest in the British Columbia cardiac arrest registry: a retrospective cohort study

ResuscitationPublished Retrospective cohort study

Authors' conclusion

One third of patients in our patient population suffering from OHCA and admitted to hospital were not coded as having a cardiac arrest.

Study context

Population
Emergency Medical Services (EMS)-treated out-of-hospital cardiac arrest (OHCA) cases from the BC Cardiac Arrest Registry that survived to hospital admission, 2012–2016of 6009 eligible OHCAs
Participants
2,032 cases
Outcome
Sensitivity of OHCA-related ICD-10 codes (preadmission comorbidity or primary reason for hospital stay) in the hospital admissions database
Methodological detailsregistry linkage
  • Registry linkage

Main finding

As reported in the abstract

Sensitivity of OHCA-related ICD-10 codes

OHCA-related ICD-10 codes recorded

66.8 %

1357/2032; 95% CI 64.7, 68.8

Observational data: associations, not effects.

Further findings

Sensitivity by sex and age group

Sensitivity did not differ across sex and age groups

Diagnoses in cases without OHCA-related codes (n = 675)

%

Acute MI as most responsible pre-admission diagnosis (225/675)
33.3
CAD-related ICD-10 codes as pre-admission diagnoses (176/675)
26.1

Original publication

Age and sex differences in the sensitivity of ICD-10 diagnostic codes for identifying patients with out-of-hospital cardiac arrest in the British Columbia cardiac arrest registry: a retrospective cohort study. Resuscitation. Published 11 December 2025. doi:10.1016/j.resuscitation.2025.110922

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