Abstract 85: Influence of Age Differences for Collapse-to--Defibrillator Time on Survival in Out-of Hospital Cardiac Arrest from All-Japan Utstein Registry Data

Abstract

[Background] The study investigated influence of age differences for collapse-defibrillator time on survival in out-of hospital cardiac arrest. Several studies had the effects of age on survival from out-of hospital cardiac arrest, however those were for medium sample size. [Method] We used All-Japan Utstein Registry of the Fire and Disaster Management Agency with a prospective, population based, involving consecutive patients with an out-of cardiac arrest with witness with layperson, from 16 to 89 years (young adult: 16-39 age, middle: 40-64 age, older: 65-89 age) and from April 1, 2006 to December 31 2009. The primary outcome measure was survival and good neurological outcome CPC 1 or 2. We evaluated the effect of collapse-defibrillator time for the outcome in logistic regression by age group. [Results] 1329 were young adults, 7400 were middles and 10315 were at older in the analysis. Odds ratio of the average effect of the time per five minutes by defibrillator was 1.53 and 95% confidence intervals (CI) 1.36 to 1.73, p<.0001 at young adult, 1.61 and 95%CI: 1.53 to 1.71, p<.0001 at middle, 1.77 and 95%CI: 1.67 to 1.87, p<.0001 at older (figure). [Conclusion] Our results suggest that the effect of the times by defibrillator has age differences. Elderly person need more to improve the delay of defibrillator.