Abstract 143: Does Bystander Gender Make Difference In Outcomes Of Out Of Hospital Cardiac Arrest?

Abstract

Objective: We hypothesize that there is difference in outcomes of out-of-hospital cardiac arrest according to bystander gender. Methods: We used a nationwide, out-of-hospital cardiac arrest cohort database during 2006-2020. We extracted cases involving patient older than 18 years with presumed cardiac etiology and witnessed arrest, but not by EMS or nursing home worker or medical personnel. The primary outcome was the good neurologic outcome. Secondary outcomes were successful bystander cardiopulmonary resuscitation rate which defined that starting bystander CPR and keep going until by EMS arrival and survival outcome. Results: The total number of populations was 24919 patients. Of these, 10413 patients (41.8%) were resuscitated by female bystander. When cardiopulmonary resuscitation by female bystander, patient more likely to achieve good neurological outcome (206(2.0%) vs 235(1.6%), p=0.344), and survival (352(3.4%) vs 400(2.8%), p=0.0046). However, female bystander less likely to do successful cardiopulmonary resuscitation (5730(55.0%) vs 9405(64.8%), p<0.0001). Adjusted odds ratios for good neurologic outcomes, survival and successful bystander cardiopulmonary resuscitation rate resuscitated by female bystander, when compared with male bystander, were 1.46 (1.18-1.80), 1.44 (1.23-1.69) and 0.68 (0.64-0.71), respectively. In the interaction model, adjusted odd ratio (95% Confidence interval) for good neurological outcome of patient resuscitated by female bystander was 1.53 (1.21-1.94) in patients who arrested at private place and 1.18 (0.71-1.98) in patients who arrested in public place. Conclusion: Patient who resuscitated by female bystander were more likely to have good neurologic outcome and achieve survival discharge. Effect of bystander gender was increased when patient arrested in private place.