Epidemiological Study of Out-of-hospital Cardiac Arrest in Shenzhen

The epidemiology of out-of-hospital cardiac arrest (OHCA) is a significant public health issue, and large-sample studies on such events within China are relatively limited. This study utilizes the Utstein model to evaluate and analyze the epidemiological characteristics of OHCA in Shenzhen from 2011 to 2018. By reviewing ambulance dispatch records and prehospital medical records from the Shenzhen Emergency Medical Center between 2011 and 2018, the study analyzed epidemiological characteristics and reported the results. The main indicators of the study include demographic characteristics such as the gender, age, location of occurrence, key time points, vital signs, chief complaints, and diagnoses of the cases. It also covers prehospital emergency treatment processes, including whether bystanders performed CPR, initial electrocardiogram results, intravenous access establishment, use of epinephrine, defibrillation, tracheal intubation, and other interventions, as well as the outcomes of resuscitation.

Study Overview

• Status: Completed
• Conditions: Out-Of-Hospital Cardiac Arrest

• Study Type: Observational
• Enrollment (Actual): 19672

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

• Sampling Method: Non-Probability Sample

Study Population

The data source consists of ambulance dispatch records and prehospital medical records documented by the Shenzhen Emergency Medical Center from 2011 to 2018.

Description

Inclusion Criteria:

• Cases with secondary diagnoses containing only the diagnostic keywords "cardiac arrest" and "sudden death"

Exclusion Criteria:

• 1. Cases with suicide, drowning, advanced cancer, trauma, shock, poisoning, cerebrovascular accidents, etc. 2.Cases with duplicate records for gender, age, time of call, pick-up and drop-off address, and initial diagnosis.

Study Plan

How is the study designed?

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Crude incidence rate	The frequency of new cases of a disease in a given population over a given period of time.	2011-01-01 to 2018-12-31
Age standardized incidence rate	Incidence rates after removing the influence of age, and incidence rates normalised by age.	2011-01-01 to 2018-12-31
Annual percentage change	Indicates the change from one year to the next within a segment at a constant percentage on a log-linear model for evaluating trends within segments.	2011-01-01 to 2018-12-31

Collaborators and Investigators

• Sponsor: Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University

Study record dates

Study Major Dates

• Study Start (Actual): January 1, 2011
• Primary Completion (Actual): December 31, 2018
• Study Completion (Actual): December 31, 2018

Study Registration Dates

• First Submitted: March 20, 2025
• First Submitted That Met QC Criteria: March 20, 2025
• First Posted (Actual): March 26, 2025

Study Record Updates

• Last Update Posted (Actual): March 26, 2025
• Last Update Submitted That Met QC Criteria: March 20, 2025
• Last Verified: July 1, 2024

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Cardiovascular Diseases; Heart Diseases; Heart Arrest; Out-of-Hospital Cardiac Arrest
• Other Study ID Numbers: SYSKY-2024-266-01