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. 2024 Aug 15:19:100748.
doi: 10.1016/j.resplu.2024.100748. eCollection 2024 Sep.

Survival of out-of-hospital cardiac arrest patients admitted to the hospital during the Tokyo Summer Olympic and Paralympic Games in Japan

Takeshi Nishimura  1 , Takuya Taira  1 , Masafumi Suga  1 , Shinichi Ijuin  1 , Akihiko Inoue  1 , Satoshi Ishihara  1
Affiliations

Survival of out-of-hospital cardiac arrest patients admitted to the hospital during the Tokyo Summer Olympic and Paralympic Games in Japan

Takeshi Nishimura et al. Resusc Plus. .

Abstract

Background: The influence of the Tokyo Summer Olympic/Paralympic Games on normal emergency medical system operations in Japan had not yet been fully elucidated. In this study, we examined whether out-of-hospital cardiac arrest (OHCA) patients treated during the Tokyo Olympic/Paralympic Games had differences in outcomes.

Methods: Using the nationwide JAAM-OHCA Registry, we evaluated the outcomes of OHCA patients admitted to the hospital during the Tokyo Olympic/Paralympic Games (July 23 to Aug. 8 and Aug. 24 to Sept. 5) in 2021, compared to those during same the dates in 2020 (Term 1: July 23 to Aug. 8 and Aug. 24 to Sept. 5), those during the pre-Olympic/Paralympic term during the same weekdays in the weeks before the event (Term 2: June. 18 to July. 4 and July. 6 to July. 18), and those during the post-Olympic/Paralympic term during the same weekdays in the weeks after the event (Term 3: Sept. 10 to Sept. 26 and Sept. 28 to Oct. 10). The primary outcome was 30-day survival, and multivariable logistic analysis was performed, adjusted for age and sex.

Results: A total of 3,111 OHCA patients were included in the study period (786 in the Olympic/Paralympic group, 774 in Term 1, 747 in Term 2, and 804 in Term 3). Crude 30-day survivals were 7.4% (58/786), 9.3% (72/774), 6.8% (51/747), and 8.2% (66/804), respectively. Using the Olympic/Paralympic group as a reference, multivariable logistic analysis revealed that 30-day survivals in Term 1 (OR 1.27 95% CI 0.88-1.83p = 0.20), Term 2 (OR 0.92 95% CI 0.62-1.36p = 0.67), and Term 3 (OR 1.10 95% CI 0.76-1.59p = 0.63) did not differ significantly.

Conclusions: No significant differences in 30-day survival for OHCA patients admitted during the Tokyo Summer Olympic/Paralympic Games were identified.

Keywords: Cardiac arrest; Mass casualty; OHCA; Olympics; Paralympics; Sports event.

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Conflict of interest statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Figures

Fig. 1
Fig. 1
Flow chart for the patients analyzed in the study.
Supplementary Fig. 1
Supplementary Fig. 1
Supplementary Fig. 2
Supplementary Fig. 2
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