Coute RA, Nathanson BH, Kurz MC, et al. - By performing this retrospective study, researchers investigated the link between Emergency Medical Services (EMS) scene time interval (STI) and survival with functional neurologic recovery after adult out-of-hospital cardiac arrest (OHCA). They analyzed prospectively obtained data from the national Cardiac Arrest Registry to Enhance Survival from January 2013 to December 2018. Participants included all adult non-traumatic, EMS-treated, bystander-witnessed OHCA with complete data. Survival with functional recovery (Cerebral Performance Category  = 1 or 2) was the primary outcome. The link between STI and the primary outcome was quantified, using multivariable logistic regression. Findings demonstrated strong link of longer STI times with poor neurologic outcome among bystander-witnessed OHCA patients. Following a STI span of about 20 min, the related risk of a poor neurologic outcome increased more rapidly.