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Fig. 1 | Critical Care

Fig. 1

From: Nighttime is associated with decreased survival and resuscitation efforts for out-of-hospital cardiac arrests: a prospective observational study

Fig. 1

Flow diagram of the study population. A total of 16,452 cardiac arrest patients were enrolled in the Survey of Survivors after Out-of-Hospital Cardiac Arrest in the Kanto Region (SOS-KANTO) 2012 study. Of the initial cohort of 16,452 patients with out-of-hospital cardiac arrest (OHCA), 288 were excluded because they were <18 years old, leaving 16,164 adult patients. Of these, 2,384 were excluded, resulting in a study cohort of 13,780 patients included in the analysis. Patients were assigned to three categories according to the time of the 911 (emergency) call receipt: daytime (0701–1500 h), evening (1501–230 h), and night (2301–0700 h)

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Critical Care

ISSN: 1364-8535