Abstract 198: Public Perceptions on Why Women Receive Less Bystander CPR Than Men in Out of Hospital Cardiac Arrest

Circulation ◽  
2018 ◽  
Vol 138 (Suppl_2) ◽  
Author(s):  
Sarah M Perman ◽  
Shelby K Shelton ◽  
Christopher Knoepke ◽  
Kathryn Rappaprt ◽  
Daniel D Matlock ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
National Sample ◽  
Public Perceptions ◽  
Free Text ◽  
Pilot Survey ◽  
Adequate Knowledge ◽  
Free Text Response ◽  
Bystander Cpr ◽  
To Receive ◽  
Hospital Cardiac Arrest

Introduction: Women who suffer an out of hospital cardiac arrest have been observed to receive less bystander cardiopulmonary resuscitation (CPR) than men. Potential reasons for why women receive less bystander CPR than men are largely unknown. Methods: Mechanical Turk (MTurk), Amazon’s crowdsourcing platform, was used to pilot a national survey asking participants why they believe women receive less bystander CPR than men. Eligible participants were adults (18 years or over) located in the US. Participants were reimbursed $1 for their participation. To ensure adequate knowledge on the subject, survey responses were excluded if they incorrectly defined CPR. Participant demographics as well as familiarity with CPR were queried. Participants were asked to answer the following free-text question “Do you have any ideas on why women may be less likely to receive CPR than men when they collapse in public?” Descriptive statistics were used to define the cohort. The free text response was coded using thematic analysis and major themes were identified via classical content analysis. Results: Within 55 minutes of deploying the pilot survey, 54 individuals responded. All respondents answered the knowledge question correctly, and none were excluded. Mean age was 36.9 ±9.6 years and 38.9% were female. Participants were geographically distributed as follows: 13% West, 13% Southwest, 16.7% Midwest, 27.8% Southeast, 29.6% Northeast. Predominant themes identified for why women might receive less bystander CPR than men are identified in Table 1. Within this cohort, 27.8% were trained in CPR, and only 5.6% of respondents had actually performed CPR on a person. Conclusions: In this pilot survey, public perceptions identified social norms regarding fear of inappropriate touching and hurting women as significant contributors to reasons for why women receive less bystander CPR than men. Additional work using a larger national sample to confirm and expand on these findings is ongoing.

scholarly journals 156 Prehospital determinants of successful resuscitation after traumatic and non-traumatic out-of-hospital cardiac arrest

2020 ◽  
Vol 37 (12) ◽  
pp. 825.1-825
Author(s):  
Ed Barnard ◽  
Daniel Sandbach ◽  
Tracy Nicholls ◽  
Alastair Wilson ◽  
Ari Ercole
Keyword(s):  
Overall Survival ◽  
Cardiac Arrest ◽  
Hospital Admission ◽  
Hospital Discharge ◽  
Multivariable Analysis ◽  
Discharge Data ◽  
Successful Resuscitation ◽  
Bystander Cpr ◽  
Number Percentage ◽  
Hospital Cardiac Arrest

Aims/Objectives/BackgroundOut-of-hospital cardiac arrest (OHCA) is prevalent in the UK. Reported survival is lower than in countries with comparable healthcare systems; a better understanding of outcome determinants may identify areas for improvement. Aim: to compare differential determinants of survival to hospital admission and survival to hospital discharge for traumatic (TCA) and non-traumatic cardiac arrest (NCTA).Methods/DesignAn analysis of 9109 OHCA in East of England between 1 January 2015 and 31 July 2017. Univariate descriptives and multivariable analysis were used to understand the determinants of survival for NTCA and TCA. Two Utstein outcome variables were used: survival to hospital admission and hospital discharge. Data reported as number (percentage), number (percentage (95% CI)) and median (IQR) as appropriate. Continuous data have been analysed with a Mann-Whitney U test, and categorical data have been analysed with a χ2 test. Analyses were performed using the R statistical programming language.Results/ConclusionsThe incidence of OHCA was 55.1 per 100 000 population/year. The overall survival to hospital admission was 27.6% (95%CI 26.7% to 28.6%) and the overall survival to discharge was 7.9% (95%CI 7.3% to 8.5%). Survival to hospital admission and survival to hospital discharge were both greater in the NTCA group compared with the TCA group: 27.9% vs 19.3% p=0.001, and 8.0% vs 3.8% p=0.012 respectively.Determinants of NTCA and TCA survival were different, and varied according to the outcome examined. In NTCA, bystander cardiopulmonary resuscitation (CPR) was associated with survival at discharge but not at admission, and the likelihood of bystander-CPR was dependent on geographical socioeconomic status.NTCA and TCA are clinically distinct entities with different predictors for outcome and should be reported separately. Determinants of survival to hospital admission and discharge differ in a way that likely reflects the determinants of neurological injury. Bystander CPR public engagement may be best focused in more deprived areas.

scholarly journals Outcomes of out-of-hospital cardiac arrest in Beijing: a 5-year cross-sectional study

BMJ Open ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. e041917
Author(s):  
Fei Shao ◽  
Haibin Li ◽  
Shengkui Ma ◽  
Dou Li ◽  
Chunsheng Li
Keyword(s):  
Cardiac Arrest ◽  
Urban Areas ◽  
Patient Characteristics ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
Term Survival ◽  
Shockable Rhythm ◽  
Bystander Cpr ◽  
Hospital Cardiac Arrest

ObjectiveThe purpose of this study was to assess the trends in outcomes of out-of-hospital cardiac arrest (OHCA) in Beijing over 5 years.DesignCross-sectional study.MethodsAdult patients with OHCA of all aetiologies who were treated by the Beijing emergency medical service (EMS) between January 2013 and December 2017 were analysed. Data were collected using the Utstein Style. Cases were followed up for 1 year. Descriptive statistics were used to characterise the sample and logistic regression was performed.ResultsOverall, 5016 patients with OHCA underwent attempted resuscitation by the EMS in urban areas of Beijing during the study period. Survival to hospital discharge was 1.2% in 2013 and 1.6% in 2017 (adjusted rate ratio=1.0, p for trend=0.60). Survival to admission and neurological outcome at discharge did not significantly improve from 2013 to 2017. Patient characteristics and the aetiology and location of cardiac arrest were consistent, but there was a decrease in the initial shockable rhythm (from 6.5% to 5.6%) over the 5 years. The rate of bystander cardiopulmonary resuscitation (CPR) increased steadily over the years (from 10.4% to 19.4%).ConclusionSurvival after OHCA in urban areas of Beijing did not improve significantly over 5 years, with long-term survival being unchanged, although the rate of bystander CPR increased steadily, which enhanced the outcomes of patients who underwent bystander CPR.

Abstract 184: AED Application in Non-Shockable Out-of-Hospital Cardiac Arrest Does Not Reduce Survival

Circulation ◽  
2018 ◽  
Vol 138 (Suppl_2) ◽  
Author(s):  
Ross A Pollack ◽  
Siobhan P Brown ◽  
Thomas Rea ◽  
Peter J Kudenchuk ◽  
Myron L Weisfeldt
Keyword(s):  
Cardiac Arrest ◽  
Primary Outcome ◽  
Patient Characteristics ◽  
Neurological Status ◽  
Relative Safety ◽  
Initial Rhythm ◽  
Bystander Cpr ◽  
Rhythm Analysis ◽  
In Transit ◽  
Hospital Cardiac Arrest

Introduction: It is well established that AEDs improve outcome in shockable out-of-hospital cardiac arrest (OHCA). An increasing proportion (now the majority) of OHCAs present with non-shockable rhythms. Survival from non-shockable OHCA depends on high-quality CPR in transit to definitive care. Studies of AED use in non-shockable in-hospital arrest (as opposed to OHCA) have shown reduced survival with AED application possibly due to CPR interruptions to apply pads and perform rhythm analysis. We sought to determine whether AED application in non-shockable public, witnessed OHCA has a significant association with survival to discharge. Methods: This is a retrospective analysis of OHCA from 2010-2015 at 10 Resuscitation Outcomes Consortium centers. All adult, public, witnessed non-shockable OHCAs were included. Non-shockable arrest was defined as no shock delivered by the AED or by review of defibrillator tracings (10%). The initial rhythm on EMS arrival was used to confirm the rhythm. The primary outcome was survival to hospital discharge with favorable neurological status (modified rankin score <3). The OR was adjusted for the Utstein variables. Results: During the study period there were 1,597 non-shockable public, witnessed OHCA, 9.8% of which had an AED applied. The initial rhythm on EMS arrival was PEA or asystole in 86% of cases. Significantly more OHCA in the AED applied group had CPR performed. 6.5% of those without an AED applied survived with favorable neurologic status compared to 9% with an AED. After adjustment for the Utstein variables including bystander CPR, the aOR for survival with favorable neurologic outcome was 1.38 (95% CI:0.72-2.65). Conclusion: After adjusting for patient characteristics and bystander CPR, the application of an AED in non-shockable public witnessed OHCA had no significant association with survival or neurological outcome supporting the relative safety and potential benefit of AED application in non-shockable OHCA.

Abstract 170: Challenges in Implementing an ECPR Program for Out of Hospital Cardiac Arrest

Circulation ◽  
2018 ◽  
Vol 138 (Suppl_2) ◽  
Author(s):  
Meshe Chonde ◽  
Jeremiah Escajeda ◽  
Jonathan Elmer ◽  
Frank X Guyette ◽  
Arthur Boujoukos ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Inclusion Criteria ◽  
Extracorporeal Cardiopulmonary Resuscitation ◽  
Implementation Challenges ◽  
Shockable Rhythm ◽  
Bystander Cpr ◽  
Stay And Play ◽  
Load And Go ◽  
Mechanical Cpr ◽  
Hospital Cardiac Arrest

Introduction: Extracorporeal cardiopulmonary resuscitation (ECPR) can treat cardiac arrest refractory to conventional therapy. Many institutions are interested in developing their own ECPR program. However, there are challenges in logistics and implementation. Hypothesis: Development of an ECPR team and identification of UPMC Presbyterian as a receiving center will increase recognition of potential ECPR candidates. Methods: We developed an infrastructure of Emergency Medical Services (EMS), Medic Command, and an in-hospital ECPR team. We identified inclusion criteria for patients with an out of hospital cardiac arrest (OHCA) likely to have a reversible arrest etiology and developed them into a simple checklist. These criteria were: witnessed arrest with bystander CPR, shockable rhythm, and ages 18 to 60. We trained local EMS crews to screen patients and review the checklist with a Command Physician prior to transport to our hospital. Results: From October 2015 to March 31 st 2018, there were 1165 dispatches for OHCA, of which 664 (57%) were treated and transported to the hospital and 120 to our institution. Of these, five patients underwent ECPR. Of the remaining cases, 64 (53%) had nonshockable rhythms, 48 (40%) were unwitnessed arrests, 50 (42%) were over age 60 and the remaining 20 (17%) had no documented reasons for exclusion. Prehospital CPR duration was 26 [IQR 25-40] min. Four patients (80%) underwent mechanical CPR with LUCAS device. Time from arrest to arrive on scene was 5 [IQR 4-6] min and time call MD command was 13 [IQR 7-21] min. Time to transport was 20 [IQR 19-21] min. Time from arrest to initiation of ECMO was 63 [IQR 59-69] min. Conclusions: ECPR is a relatively infrequent occurrence. Implementation challenges include prompt identification of patients with reversible OHCA causes, preferential transport to an ECPR capable facility and changing the focus of EMS in these select patients from a “stay and play” to a “load and go” mentality.

Abstract P80: Short-term Outcomes of Vasopressin Administerd with Epinephrine versus Epinephrine Alone in ED for Out-of-hospital Cardiac Arrest

Circulation ◽  
2008 ◽  
Vol 118 (suppl_18) ◽  
Author(s):  
Tae Yun Kim ◽  
Sun Woo Lee ◽  
Kyuseok Kim ◽  
Joong Eui Rhee ◽  
Sung Koo Jung
Keyword(s):  
Cardiac Arrest ◽  
Spontaneous Circulation ◽  
National Registry ◽  
Controlled Clinical Trial ◽  
Emergency Medical Service System ◽  
Short Term ◽  
Combined Administration ◽  
Before And After ◽  
Bystander Cpr ◽  
Hospital Cardiac Arrest

Introduction: Out-of-hospital cardiac arrest (OOHCA) victims are increasing, but emergency medical service system (EMSS) is not ready for them in Korea. A previous randomized, controlled clinical trial has suggested that vasopressin followed epinephrine was superior to epinephrine in patients with asystole. According to the Korean national registry of OOHCA, patients with asystole were more than two thirds of them. In Korean EMSS, no drugs are permitted to administer in the prehospital phase by law. Thereafter epinephrine or vasopressin cannot be administered until patients are transported to emergency departments (EDs). This study was to evaluate whether the combined administration of vasopressin and epinephrine in ED for OOHCA patients would increase the return of spontaneous circulation (ROSC) and survival discharge. Methods: From October 2007 to May 2008, we changed the CPR protocol in adult, nontraumatic OOHCA that 40 U of vasopressin was administered as soon as possible after the first dose of epinephrine (the after group). Cardiac arrest data were collected using the Utstein template. Data from January to September 2007, when vasopressin has not been used, were also collected for comparative analysis (the before group). These two groups were compared in terms of ROSC, and survival discharge Results: There were 45 and 50 patients in the before and after groups, respectively. There was no significant differences in the initial ECG rhythm of asystole (67% vs 78%), witnessed arrest (73% vs 72%), bystander CPR (16% vs 10%), time from collapse to BLS time (6 min vs 8.5 min), and time from collapse to study drugs (23 min vs 26.5 min). The rate of sustained ROSC was similar between the before and after groups (53% vs 48%, P=0.604) as was the survival discharge (27% vs 14%, P=0.123). Conclusions: Vasopressin with administerd with epinephrine does not increase the rate of ROSC nor the survival discharge.

scholarly journals Bystander Cardiopulmonary Resuscitation Quality: Potential for Improvements in Cardiac Arrest Resuscitation

2021 ◽  
Author(s):  
Richard Chocron ◽  
Julia Jobe ◽  
Sally Guan ◽  
Madeleine Kim ◽  
Mia Shigemura ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Cardiopulmonary Resuscitation ◽  
Performance Metrics ◽  
Medical System ◽  
Emergency Medical System ◽  
Compression Rate ◽  
Emergency Medical ◽  
Bystander Cardiopulmonary Resuscitation ◽  
Bystander Cpr ◽  
Hospital Cardiac Arrest

Background Bystander cardiopulmonary resuscitation (CPR) is a critical intervention to improve survival following out‐of‐hospital cardiac arrest. We evaluated the quality of bystander CPR and whether performance varied according to the number of bystanders or provision of telecommunicator CPR (TCPR). Methods and Results We investigated non‐traumatic out‐of‐hospital cardiac arrest occurring in a large metropolitan emergency medical system during a 6‐month period. Information about bystander care was ascertained through review of the 9‐1‐1 recordings in addition to emergency medical system and hospital records to determine bystander CPR status (none versus TCPR versus unassisted), the number of bystanders on‐scene, and CPR performance metrics of compression fraction and compression rate. Of the 428 eligible out‐of‐hospital cardiac arrest, 76.4% received bystander CPR including 43.7% unassisted CPR and 56.3% TCPR; 35.2% had one bystander, 33.3% had 2 bystanders, and 31.5% had ≥3 bystanders. Overall compression fraction was 59% with a compression rate of 88 per minute. CPR differed according to TCPR status (fraction=52%, rate=87 per minute for TCPR versus fraction=69%, rate=102 for unassisted CPR, P <0.05 for each comparison) and the number of bystanders (fraction=55%, rate=87 per minute for 1 bystander, fraction=59%, rate=89 for 2 bystanders, fraction=65%, rate=97 for ≥3 bystanders, test for trend P <0.05 for each metric). Additional bystander actions were uncommon to include rotation of compressors (3.1%) or application of an automated external defibrillator (8.0%). Conclusions Bystander CPR quality as gauged by compression fraction and rate approached guideline goals though performance depended upon the type of CPR and number of bystanders.

Bystander CPR, ventricular fibrillation, and survival in witnessed, unmonitored out-of-hospital cardiac arrest

Resuscitation ◽  
1996 ◽  
Vol 31 (1) ◽  
pp. 83-84 ◽  
Author(s):  
RA Swor ◽  
RE Jackson ◽  
M Cynar ◽  
E Sadler ◽  
E Basse ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Ventricular Fibrillation ◽  
Bystander Cpr ◽  
Hospital Cardiac Arrest

Abstract 19427: Epidemiology and Outcomes of Out-of-hospital Cardiac Arrest in Qatar

Circulation ◽  
2015 ◽  
Vol 132 (suppl_3) ◽  
Author(s):  
Furqan B Irfan ◽  
Zain A Bhutta ◽  
Tooba Tariq ◽  
Loua A Shaikh ◽  
Pregalathan Govender ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Incidence Rate ◽  
Hospital Discharge ◽  
Middle Eastern ◽  
Cerebral Performance Category ◽  
Pulseless Electrical Activity ◽  
Final Analysis ◽  
National Registry ◽  
Bystander Cpr ◽  
Hospital Cardiac Arrest

Aim: There is a scarcity of population based studies on out-of-hospital cardiac arrest (OHCA) in the Middle East and the wider Asian region. This study describes the Epidemiology and outcomes of OHCA in Qatar, a Middle Eastern country. Methods: Data was extracted retrospectively from a national registry on all adult cardiac origin OHCA patients attended by Emergency Medical Services (EMS) in Qatar, from June 2012 - May 2013. Results: The annual crude incidence rate of cardiac origin OHCA attended by EMS was 23.5 per 100,000. The age-sex standardized incidence rate was 87.83 per 100,000 population. The annual sex-standardized incidence rate for males and females was 91.5 and 84.25 per 100,000 population respectively. Of 447 adult, cardiac origin OHCA patients included in the final analysis, most were male (n=360, 80.5%) with median age of 51 years (IQR = 39-66). Frequently observed nationalities of OHCA cases were Qatari (n=89, 19.9%), Indian (n=74, 16.6%) and Nepalese (n=52, 11.6%). Common initial cardiac arrest rhythms were asystole (n=301, 67.3%), ventricular fibrillation (n=82, 18.3%) and pulseless electrical activity (n=49, 11%). OHCA was unwitnessed (n=220, 49%) in nearly half of the cases while bystanders witnessed it in 170 (38%) patients. Bystander CPR was carried out in 92 (20.6%) of the cases. Of 187 (41.8%) patients who were given shocks, bystander defibrillation was delivered to 12 (2.7%) patients. Prehospital outcomes; 332 (74.3%) patients did not achieve return of spontaneous circulation (ROSC), 40 (8.9%) patients achieved unsustainable ROSC, 58 (13%) achieved ROSC till Emergency department (ED) handover and 5 patients achieved ROSC but rearrested again before reaching ED. Survival to hospital discharge occurred in 38 (8.5%) patients. Neurological outcomes were assessed utilizing Cerebral Performance Category [CPC] scores with a favorable CPC score of 1-2 at discharge in 27 (6%) patients, while 11 (2.5%) patients had a poor CPC score of 3-4. Of those with CPC score 1-2 at hospital discharge, 59% and 26% had CPC score 1-2, at 1 and 3 years follow-up respectively. Overall survival was 9.7%. Conclusion: Standardized rates are comparable to western countries, there are significant opportunities to improve outcomes, including better bystander CPR.

Abstract 219: Out-of-Hospital Cardiac Arrest in Vienna 2014

Circulation ◽  
2014 ◽  
Vol 130 (suppl_2) ◽  
Author(s):  
Markus Keferböck ◽  
Philip Datler ◽  
Mario Krammel ◽  
Elisabeth Lobmeyer ◽  
Alexander Nürnberger ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Outcome Measures ◽  
Primary Outcome ◽  
Sudden Cardiac Arrest ◽  
Cerebral Performance Category ◽  
Medical Personnel ◽  
Shockable Rhythm ◽  
Initial Rhythm ◽  
Bystander Cpr ◽  
Hospital Cardiac Arrest

Background: Sudden cardiac arrest (SCA) and especially the out of hospital cardiac arrest (OHCA) is always an urgent situation, which requires well trained medical personnel. The emergency medical system (EMS) in Vienna took part in the Circulation Improving Care (CIRC) trial form 2008 to 2010. In this time they had an additional training. Therefore we revaluated the outcome of OHCA nowadays. Method: Interim report of a prospective observational study of all humans over eighteen, who suffer an OHCA resuscitated by the EMS in Vienna from August 2013 - April 2014. For those patients, who survived 30 days, a cerebral performance category score (CPC) was evaluated. Results: During nine months 701 patients could be investigated and 625 achieved the protocol for this trial. The median age of the patients was 68 years (IQR 59-79) and 399 (64%) were male. Witnessed by bystanders was the cardiac arrest in 359 (57%) patients. In the latter patients restoration of spontaneous circulation (n=223, 36%)(ROSC) and 30 day survival (n=166, 27%) was significantly more often achieved than in patients with non-witnessed cardiac arrest. Bystanders provided chest compressions in 284 (45%) cases and in this subgroup a shockable initial rhythm was more often (p<0.0001). Still in 189 (53%) of the patients where the cardiac arrest was witnessed, bystander resuscitation wasn′t attempted. An initial shockable rhythm was found in 146 (24%) patients with significant better outcome in all primary outcome measures. Of the 62 (10%) 30-days-survivors, 33 (6%) had good neurological outcome with a CPC 1-2.In 12 (2%) cases the CPC was missing. Conclusion: The results are comparable to findings of our previous studies. A significant better result in all primary outcome measures could be found for witnessed OHCA with an initial shockable rhythm. Furthermore those patients with bystander CPR had significant more often a shockable initial rhythm. Therefore more efforts have to be invested into encouraging the community to start with a bystander CPR if an OHCA is witnessed.

Abstract 284: Association of Neurological Outcome and Survival With Interventions by Bystander and Emergency Medical Service for Unwitnessed Out-of-Hospital Cardiac Arrest Patient; Results From the JCS-ReSS Study

Circulation ◽  
2018 ◽  
Vol 138 (Suppl_2) ◽  
Author(s):  
Chisato Okamoto ◽  
Yoshio Tahara ◽  
Atsushi Hirayama ◽  
Satoshi Yasuda ◽  
Teruo Noguchi ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Airway Management ◽  
Emergency Medical Service ◽  
Neurological Outcome ◽  
Medical Service ◽  
Favorable Outcome ◽  
Shockable Rhythm ◽  
Advanced Airway ◽  
Bystander Cpr ◽  
Hospital Cardiac Arrest

Introduction: Although studies have shown that bystander cardiopulmonary resuscitation (CPR) in witnessed out-of-hospital cardiac arrest (OHCA) is associated with better neurological prognosis, whether bystander and Emergency Medical Service (EMS) interventions are associated with prognosis in unwitnessed OHCA patients is not fully elucidated. We aimed to investigate the prognostic importance of bystander and EMS interventions among unwitnessed OHCA patients in Japan. Methods and Results: This study was a nation-wide population-based observational study of OHCA in Japan from 2011 to 2015 based on data from the All-Japan Utstein Registry. The outcome measures were neurological outcome and survival at 30-day. The neurologically favorable outcome was defined as Glasgow-Pittsburgh cerebral performance category score 1 or 2. First, to investigate the effectiveness of bystander interventions, we included 105,655 unwitnessed cardiogenic OHCA patients (aged 18-80 years). Of these, 1,614 (1.5%) showed neurologically favorable outcome and 3,273 (3.1%) survived at 30-day. Multivariate logistic regression analysis adjusting for age, sex, geographical region, year and EMS response time showed that bystander CPR was associated with neurologically favorable outcome (adjusted odds ratio [aOR] 1.49, 95% CI 1.35-1.65, P<0.001). Additionally, to investigate the effectiveness of EMS interventions for patients with non-shockable rhythm, we examined 43,342 patients who were performed public CPR and had the initial rhythm of pulseless electrical activity (PEA) or asystole. Of these, 101 (0.2%) showed neurologically favorable outcome and 453 (1.0%) were survival at 30-day. Advanced airway management by EMS was negatively associated with neurologically favorable outcome (aOR 0.55, 95% CI 0.37-0.81, P=0.003) and administration of epinephrine by EMS was associated with survival (aOR 2.35, 95% CI 1.89-2.92, P<0.001). Conclusions: Among unwitnessed OHCA patients, bystander CPR was associated with neurologically favorable prognosis. For unwitnessed OHCA patients with non-shockable rhythm, epinephrine administration was associated with survival, but advanced airway management was negatively associated with neurological outcome.

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