ArticleScientific reports2026
Impact of EMS call timing on bystander CPR and survival after cardiac arrest in care facilities.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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4 authors.
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Abstract
The impact of pre- versus post-arrest emergency calls from care facilities on out-of-hospital cardiac arrest (OHCA) outcomes remains unclear. This study examined how call timing and time of day influence bystander cardiopulmonary resuscitation (BCPR) and 1-month survival. We conducted a nationwide retrospective cohort study from 2017 to 2022. We analyzed 27,222 witnessed OHCAs of presumed cardiac origin in adults aged ≥ 65 years in care facilities. Pre-arrest calls were defined as cases in which the witnessed time occurred after the EMS call time; post-arrest calls were those in which the witnessed time was the same as or earlier than the call time. The primary outcome was 1-month survival and the secondary was BCPR rate. Propensity score matching and logistic regression were used for survival analysis. Of all cases, 10,789 (39.6%) were preceded by pre-arrest calls. BCPR was less frequent in pre-arrest than post-arrest cases (43.3% vs. 84.4%; p < 0.01). Survival was highest during daytime (8.0%) and lowest at night (3.3%). Nighttime occurrence (adjusted odds ratio = 0.45, confidence interval = 0.40–0.51) and pre-arrest calls (0.78, 0.68–0.89) independently predicted lower survival. Early EMS activation alone is insufficient. Continuous dispatcher guidance and improved night-shift preparedness in care facilities may enhance OHCA outcomes.
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