Association between time of out-of-hospital cardiac arrest and survival: Examination of the all-Japan Utstein registry and comparison with the 2005 and 2010 international resuscitation guidelines

Background Existing studies have yielded conflicting results regarding the relationship between the time of occurrence of out-of-hospital cardiac arrests and the associated outcomes. We examined whether the one-month survival rate for out-of-hospital cardiac arrests differed depending on whether the cardiac arrest occurred during the day or night. Further, we examined whether this rate differed when comparing the period succeeding the 2005...