All adults with witnessed, non-traumatic OHCA, from 1 January 2005 to 31 December 2008, treated by
the emergency medical services (EMS) with an advanced airway in Osaka, Japan were studied in a prospective
Utstein-style population cohort database. The primary outcome measure was one-month survival with
neurologically favorable outcome. The association between type of advanced airway (ETI/SGA), timing of device
placement and neurological outcome was assessed by multiple logistic regression.