Sex-unique Disparities in Survival and Resuscitation After Out-of-hospital Cardiac Arrest - a Danish Analysis

Completed

• Conditions: Out-Of-Hospital Cardiac Arrest

• Registration Number: NCT05583084
• Lead Sponsor: Prehospital Center, Region Zealand

Brief Summary

The goal of this observational study is to investigate characteristics in out-of-hospital cardiac arrests (OHCA) related to sex differences.

The main questions it aims to answer are:

* are there possible differences in help provision by bystanders, cardiopulmonary resuscitation (CPR), pre-hospital treatment by emergency medical services (EMS)?

* are there differences in the presence of shockable initial rhythm (SIR) and survival rates after OHCA at successive stages of treatment? Researchers will compare all emergency medical services treated resuscitations in Denmark between 2016 and 2021 to see if there are possible differences between sexes.

Detailed Description

This analysis will be based on data from the national electronic based Danish OHCA registry. Data on OHCAs with resuscitative attempts in Denmark have been collected in the electronic based Danish Medical Service report system since 2016. The registry covers detailed data including the EMS report, executive entries, and advanced text searches of prehospital charts. All cases go through an elaborate validation process where all identified events are read through manually by an external verification team. This ensures high quality of data, collected according to the Utstein recommendations, throughout the approximately 5400 cases of OHCA in Denmark annually. During this verification process, supplementary sources of data are linked to each OHCA, among others information about survival, localization, initiation of bystander CPR and EMS personnel operation.

Study Timeline

• Study Start: 2016-01-01
• Primary Completion: 2021-12-31
• Study Completion: 2021-12-31
• Status Verified: 2022-10
• Study First Submitted: 2022-10-05
• Study First Submitted QC: 2022-10-13
• Last Update Submitted: 2022-10-13
• Study First Posted: 2022-10-17
• Last Update Posted: 2022-10-17

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 27000

Inclusion Criteria

• All emergency medical services treated resuscitations in Denmark between 2016 and 2021

Exclusion Criteria

• Patients that are found dead at emergency medical service arrival, with sure death indicators such as rigor mortis or livores.

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
30-days survival	30 days from OHCA	Records on survival after 30 days from cardiac arrest

Secondary Outcome Measures

Name	Time	Method
Return of spontaneous circulation (ROSC) at any time	2016-2021	Whether or not there was return of spontaneous circulation at any time
Cardiopulmonary Resuscitation (CPR)	2016-2021	Whether or not CPR was performed on the patient
Presence of shockable initial rhythm (SIR)	2016-2021	Whether or not a schockable intial rhythm was recorded