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- •Neurologically favorable survival rate was ≥1% in PEA even for patients aged ≥85 years.
- •Neurologically favorable survival rate was <1% in Asystole among all age groups.
- •PEA and Asystole should be distinguished from the perspective of medical futility.
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☆Contributors: T. Fukuda, the principal investigator, participated in the study con- ception, design and completion, the data collection, management, and analysis, the interpretation of results and the revision of the manuscript and contributed to the final report. N. Ohashi-Fukuda, T. Matsubara, K. Doi, Y. Kitsuta, S. Nakajima, and N. Yahagi participated in the study con- ception, the data collection and management, and the interpretation of results. T. Fukuda performed the statistical analysis. All of the authors approved the final version. T. Fukuda takes responsibility for all aspects of the reliability and freedom from bias of the data presented and their discussed interpretation.
☆☆Role of the funding source: We received no funding for this study. There were no sponsors who played a role in the data analysis, the data interpretation, or the compo- sition of the report. The FDMA collected and managed the data, but played no role in the design or performance of the study. The corre- sponding author had full access to all of the data in the study and had final responsibility for the decision to submit the manuscript for publication.