Fig 2.

Analysis stratified by type of advanced airway management (AAM) in matched cohort. *Matched control at same timing of supraglottic airway placement or endotracheal intubation. †Adjusted for prefecture preference categories for performing supraglottic airway placement and endotracheal intubation, year, season, day, time, age, sex, cause of cardiac arrest, witness category, basic life support by bystander with or without dispatcher instruction, use of public access defibrillator, pre-hospital involvement of physician, time from call to cardiopulmonary resuscitation by emergency medical services personnel, defibrillation before matching, and administration of adrenaline before matching