Abstract 265: Sex-Based Differences in Clinical Outcomes of Out-of-Hospital Cardiac Arrest Patients

Abstract

Introduction: Historically, studies have shown lower overall survival rates for women following out of hospital cardiac arrests (OHCA). Despite advancements in resuscitation care over recent years, it is not clear if sex-based differences in inpatient mortality and postresuscitation outcomes have improved. Aims: We aim to investigate if gender disparities still exist in the clinical outcomes of OHCA patients. Methods: A national cohort of patients primarily hospitalized for cardiac arrest was identified using the 2019 National Inpatient Sample database. The study cohort was divided into male and female populations. The primary outcome was inpatient mortality. Secondary endpoints assessed length of stay and discharge to home rates (as a surrogate to functional status on discharge). Results: A total of 28,890 admissions were identified during the study period. Of them, 63.6% (n = 18,365) were males and 36.4% (n = 10,510) were females. The overall unadjusted inpatient mortality rate was 52.2% (n = 15,065) and was lower in females than males [48% (n = 5,040) vs 54.6% (n = 10,025), p < 0.001]. However, after adjusting for potential confounders in Table 1, the female sex was associated with higher adjusted inpatient mortality (aOR 1.085, 95% CI 1.023-1.150, p = 0.007). The average LOS for those who survived to hospital discharge was 5.0 days (IQR 2-10) and was similar between both groups (p = 0.703). Of those who survived to hospital discharge, disposition to home was significantly higher in males (49.3%, n = 4,940) than in females (41.3%, n = 2,080), (p < 0.001). Conclusions: Female sex remains an independent predictor of inpatient mortality in patients admitted with OHCA. Discharge to home after successful resuscitation was lower in females than males, suggestive of worsened functional status on discharge.