title: Are trained individuals more likely to perform bystander CPR? An observational study.
abstract: BACKGROUND
  This study aimed to evaluate the association of cardiopulmonary resuscitation (CPR) training with bystander resuscitation performance and patient outcomes after out-of-hospital cardiac arrest (OHCA).
  
  
  METHODS
  This was a prospective, population-based cohort study of all persons aged 18 years or older with OHCA of presumed intrinsic origin and their rescuers from January through December 2008 in Takatsuki, Osaka prefecture, Japan. Data on resuscitation of OHCA patients were obtained by emergency medical service (EMS) personnel in charge based on the Utstein style. Rescuers' characteristics including experience of CPR training were obtained by EMS personnel interview on the scene. The primary outcome was the attempt of bystander CPR.
  
  
  RESULTS
  Data were collected for 120 cases out of 170 OHCAs of intrinsic origin. Among the available cases, 60 (50.0%) had previous CPR training (trained rescuer group). The proportion of bystander CPR was significantly higher in the trained rescuer group than in the untrained rescuer group (75.0% and 43.3%; p = 0.001). Bystanders who had previous experience of CPR training were 3.40 times (95% confidence interval 1.31-8.85) more likely to perform CPR compared with those without previous CPR training. The number of patients with neurologically favorable one-month survival was too small to evaluate statistical difference between the groups (2 [3.3%] in the trained rescuer group versus 1 [1.7%] in the untrained rescuer group; p = 0.500).
  
  
  CONCLUSIONS
  People who had experienced CPR training had a greater tendency to perform bystander CPR than people without experience of CPR training. Further studies are needed to prove the effectiveness of CPR training on survival.
authors.affiliation: Department of Preventive Services, Kyoto University School of Public Health, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan.
authors.forename: Kayo
authors.initials: K
authors.lastname: Tanigawa
authors.forename: Taku
authors.initials: T
authors.lastname: Iwami
authors.forename: Chika
authors.initials: C
authors.lastname: Nishiyama
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Nonogi
authors.forename: Takashi
authors.initials: T
authors.lastname: Kawamura
mesh_terms: D016887:Cardiopulmonary Resuscitation / Q000193:education / Q000592:standards*; D004501:Education, Medical / Q000592:standards*; D004632:Emergency Medical Services / Q000592:standards*; D004634:Emergency Medical Technicians / Q000193:education*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D058687:Out-of-Hospital Cardiac Arrest / Q000628:therapy*; D010818:Practice Patterns, Physicians'; D011446:Prospective Studies