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J EMS Med > Volume 4(1); 2025 > Article |
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AUTHORS’ CONTRIBUTIONS
Conceptualization, Data curation, Formal analysis, Investigation, Methodology: NN. Project administration: NN, HU. Software: NN. Supervision: KN, HU, KH, HT. Visualization: NN. Writing-original draft: NN, KN. Writing-review & editing: KN, HU, KH, HT. All authors have read and agreed to the published version of the manuscript.
Values are presented as mean±standard deviation or number (%). The “Before group” refers to the study period from May 2 to November 30, 2021, and the “After group” refers to the research period from May 2 to November 30, 2022.
AED, automated external defibrillator; ECG, electrocardiogram; VF, ventricular fibrillation; PEA, pulseless electrical activity; SGA, supraglottic airway device; IV, intravenous; No. of IV injections, number of attempted IV injections; 119, emergency phone number of the fire department in Japan; Time spent on scene, on-scene arrival to on-scene departure; Hospital transport time, departure from the scene to arrival at the hospital; Hospital contact time, arrival on scene to hospital contact; Time to first defibrillation, time from patient contact to first defibrillation; Time to SGA, time from patient contact to SGA implementation.
B | 95% CI | β | P-value | |
---|---|---|---|---|
Univariable analysis | –37.2 | –167.2 to 92.7 | –0.1 | 0.57 |
Multivariable analysis | –27.1 | –146.0 to 91.8 | –0.08 | 0.65 |
In this study, multiple liner regression analysis was performed on a total of 7 variables: a dummy variable for whether the patient belonged to before group or after group and 6 explanatory variables that may affect adrenaline time (age, sex, number of ELST on board, time required to select a medical facility, with or without mechanical chest compression device, number of intravenous injections). Multiple liner regression analysis was performed on the variables. The coefficient of determination (R2) was R2=0.35 to evaluate the accuracy of the model.
B, unstandardized partial regression coefficient; CI, confidence interval; β, standardized partial regression coefficient.
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