Why the study?
Previous studies showed differing OHCA incidence across days of the week, prompting comparison of diurnal variability between days with the highest versus lowest incidence.
Does the circadian variability of out-of-hospital cardiac arrest differ between days of the week with highest (Saturday-Monday) versus lowest (Tuesday-Friday) incidence?
Population
815 OHCA cases with presumed cardiac etiology in Opole, Poland
Comparison
Saturday to Monday vs Tuesday to Friday
Design
Retrospective observational study
Key result
The occurrence of out-of-hospital cardiac arrest exhibited a pronounced morning peak on Saturday to Monday (median 8.0) that was absent during mid-week days (median 5.0, p=0.03).
Authors
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OHCA shows weekday-specific circadian patterns; hypothesis-generating for targeted prevention, prospective studies needed before practice implications.
Observational (n=815)
No
Does the circadian variability of out-of-hospital cardiac arrest differ between days of the week with highest (Saturday-Monday) versus lowest (Tuesday-Friday) incidence?
Absolute Event Rate: 8% vs 5%
p-value: p=0.03
The occurrence of out-of-hospital cardiac arrest exhibits a pronounced morning peak on Saturday to Monday that is absent during mid-week days.
Stanisław Szczerbiński (2020) conducted an observational in Out-of-hospital cardiac arrest (n=815). Saturday to Monday vs. Tuesday to Friday was evaluated on Morning peak (09:00-11:59) of OHCA occurrence (median number of cases) (p=0.03). The occurrence of out-of-hospital cardiac arrest exhibited a pronounced morning peak on Saturday to Monday (median 8.0) that was absent during mid-week days (median 5.0, p=0.03).