An initially shockable electrocardiogram proved to be a suitable tool for risk assessment and decision making in order to predict a successful outcome in elderly victims of out-of-hospital cardiac arrest. However, the outcomes of elderly patients seemed to be exceptionally poor in frail individuals and need to be considered in order to reduce unnecessary treatment decisions.
Objectives
Survival after out-of-hospital cardiac arrest (OHCA) varies between
communities, due in part to variation in the methods of measurement. The Utstein
template was disseminated to standardize comparisons of risk factors, quality of care
and outcomes in patients with OHCA. We sought to assess whether OHCA registries are able
to collate common data using the Utstein template. A subsequent study will assess
whether the Utstein factors explain differences in survival between emergency medical
services (EMS) systems.
Study design
Retrospective study.
Setting
This retrospective analysis of prospective cohorts included adults treated for
OHCA, regardless of the etiology of arrest. Data describing the baseline characteristics
of patients, and the process and outcome of their care were grouped by EMS system,
de-identified then collated. Included were core Utstein variables and timed event data
from each participating registry. This study was classified as exempt from human
subjects’ research by a research ethics committee.
Measurements and Main Results
Twelve registries with 265 first-responding EMS agencies in 14 countries
contributed data describing 125,840 cases of OHCA. Variation in inclusion criteria,
definition, coding, and process of care variables were observed. Contributing registries
collected 61.9% of recommended core variables and 42.9% of timed event
variables. Among core variables, the proportion of missingness was mean 1.9 ±
2.2%. The proportion of unknown was mean 4.8 ± 6.4%. Among time
variables, missingness was mean 9.0 ± 6.3%.
Conclusions
International differences in measurement of care after OHCA persist. Greater
consistency would facilitate improved resuscitation care and comparison within and
between communities.
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