Nursing Home Versus Community Resuscitation After Cardiac Arrest: Comparative Outcomes and Risk Factors

Objective To investigate the characteristics and outcomes of patients who experienced cardiac arrest in nursing homes compared with those in private residences and determine prognostic factors for survival. Design This was a retrospective study that analyzed data from an Utstein-style registry of the Tokyo Fire Department. Setting and Participants We identified patients aged ≥65 years who experienced cardiac arrest in a nursing home or private residence from the population-based registry of out-of-hospital cardiac arrests in Tokyo, Japan, from 2014 to 2018. Methods Patients were grouped into the nursing home or the private residence groups according to their cardiac arrest location. We compared the characteristics and outcomes between the 2 groups and determined prognostic factors for survival in the nursing home group. The primary outcome was 1-month survival after cardiac arrest. Results In total, 37,550 patient records (nursing home group = 6271; private residence group = 31,279) were analyzed. Patients in the nursing home group were significantly older and more often had witnessed arrest, bystander cardiopulmonary resuscitation (CPR), and shock delivery using an automated external defibrillator. The 1-month survival rate was significantly higher in the nursing home group (2.6% vs 1.8%, P < .001). In the best scenario (daytime emergency call, witnessed cardiac arrest, bystander CPR provided), the 1-month survival rate after cardiac arrest in the nursing home group was 8.0% (95% confidence interval 6.4–9.9%), while none survived if they had neither witness nor bystander CPR. Conclusions and Implications Survival outcome was significantly better in the nursing home group than in the private residence group and was well stratified by 3 prognostic factors: emergency call timing, witnessed status, and bystander CPR provision. Our results suggest that a decision to withhold vigorous treatment solely based on nursing home residential status is not justified, while termination of resuscitation may be determined by considering significant prognostic factors.