Abstract 347: End-Stage Renal Disease (ESRD) Patients Undergoing Hemodialysis Have Higher Possibility of Return of Spontaneous Circulation (ROSC) During Out-Hospital Cardiac Arrest (OHCA) and Non-Inferior Short-Term Survival: A Nationwide Population Cohort Study in Taiwan
Objective: To compare the incidence rate of return of spontaneous circulation (ROSC) between end-stage renal disease (ESRD) patients undergoing hemodialysis and non-ESRD patients after out-hospital cardiac arrest (OHCA) and subsequent hospital outcomes. Participants and Methods: We enrolled a cohort of 101,876 ESRD patients undergoing hemodialysis between 2000 and 2010 years. After matching for age and gender, an equal number of non-ESRD patients were enrolled to serve as the comparison cohort. We compared the incidence rate of OHCA and subsequent ROSC between the two cohorts. Hazard ratios (HRs) with 95% confidence interval (CI) of OHCA incidence rate were calculated using the Cox proportional hazards regression model. Chi-square test was conducted to compare the incidence rate of ROSC between the two cohorts. Multi-variate analysis with logistic regression was conducted to calculate the odds ratio (OR) of ROSC for different variables. Kaplan-Meier analysis with log-rank test was conducted to determine the difference of survival rate after ROSC between the two cohorts. Results: During the median follow-up of 3.71 and 5.65 years for ESRD and non-ESRD patients, there were 2563 (2.51%) and 1125 (1.10%) OHCA events, respectively. The condition of ESRD undergoing hemodialysis presented as an risk factor to develop OHCA compared with non-ESRD patients (adjusted HR = 2.11, 95% CI 1.89-2.36, P <0.0001 ). Within these OHCA patients with ESRD and non-ESRD, 1085 of 2563 (42.33%) and 202 of 1125 (17.96%) patients got ROSC. In the multivariate analysis with logistic regression, ESRD under hemodialysis presented to be a protective factor for ROSC (adjusted OR = 2.47, 95% CI 1.90-3.21, P <0.0001). In the further Kaplain-Meier analysis with log-rank test, the ESRD patients with OHCA and subsequent ROSC had a better 30-day hospital survival rate compared with the non-ESRD patients. Conclusion: Although, ESRD patients undergoing hemodialysis had a higher incidence rate of OHCA compared with non-ESRD patients. They had a higher possibility to get ROSC and had a better short-term hospital outcome. This observation may be explained by the training of vascular compliance during regular hemodialysis.