Abstract
Objective: To determine whether geographic OHCA risk is stable over time in a Canadian urban setting.
Methods: We identified all atraumatic public-location OHCAs in Toronto, Canada from Jan. 2006 – Dec. 2014 and allocated each of them to one of the 140 neighborhoods defined by the City of Toronto. We then calculated the intra-class correlation (ICC) to measure the relative variability of OHCA counts within and between neighbourhoods over time.
Results: We identified 2506 atraumatic public OHCAs. The figure shows that the average number of public OHCAs in Toronto was 278.4 (±41.4) per year. The highest-risk neighborhood had an average number of 12.9 OHCAs per year and remained the highest-risk neighborhood during six of the nine years. The four lowest-risk neighborhoods each had a rate of 0.1 OHCA per year. The ICC value was 0.67 [95% CI, 0.61 to 0.73], indicating that there was less year-to-year variation within the same neighborhood (i.e., more temporal stability) and more variation between neighborhoods.
Conclusion: The OHCA rate in Toronto is stable at the neighborhood level over time. High-risk neighborhoods tend to remain high-risk, which supports focusing public health resources in those areas to increase the efficiency of these scarce resources and improve long-term impact.
| Original language | English |
|---|---|
| Article number | A15003 |
| Journal | Circulation |
| Volume | 132 |
| Issue number | Suppl. 3 |
| Publication status | Published - 2015 |
| Event | Resuscitation Science Symposium 2015 - Orange County Convention Center, Orlando, United States Duration: 7 Nov 2015 → 9 Nov 2015 |
Fingerprint
Cite this
}
Spatiotemporal Stability of Public Cardiac Arrests. / Demirtas, Derya; Brooks, Steven C.; Morrison, Laurie J.; Chan, Timothy C.Y.
In: Circulation, Vol. 132, No. Suppl. 3, A15003, 2015.Research output: Contribution to journal › Meeting Abstract › Academic
TY - JOUR
T1 - Spatiotemporal Stability of Public Cardiac Arrests
AU - Demirtas, Derya
AU - Brooks, Steven C.
AU - Morrison, Laurie J.
AU - Chan, Timothy C.Y.
N1 - Abstracts From the American Heart Association's 2015 Scientific Sessions and Resuscitation Science Symposium
PY - 2015
Y1 - 2015
N2 - Background: Public access automated external defibrillator (AED) deployment and community cardiopulmonary resuscitation (CPR) programs should target geographical areas with high risk of out-of-hospital cardiac arrest (OHCA). Although these long-term, location-based interventions implicitly assume that the geographical OHCA risk remains stable over time, there is a paucity of evidence to support this assumption.Objective: To determine whether geographic OHCA risk is stable over time in a Canadian urban setting.Methods: We identified all atraumatic public-location OHCAs in Toronto, Canada from Jan. 2006 – Dec. 2014 and allocated each of them to one of the 140 neighborhoods defined by the City of Toronto. We then calculated the intra-class correlation (ICC) to measure the relative variability of OHCA counts within and between neighbourhoods over time.Results: We identified 2506 atraumatic public OHCAs. The figure shows that the average number of public OHCAs in Toronto was 278.4 (±41.4) per year. The highest-risk neighborhood had an average number of 12.9 OHCAs per year and remained the highest-risk neighborhood during six of the nine years. The four lowest-risk neighborhoods each had a rate of 0.1 OHCA per year. The ICC value was 0.67 [95% CI, 0.61 to 0.73], indicating that there was less year-to-year variation within the same neighborhood (i.e., more temporal stability) and more variation between neighborhoods.Conclusion: The OHCA rate in Toronto is stable at the neighborhood level over time. High-risk neighborhoods tend to remain high-risk, which supports focusing public health resources in those areas to increase the efficiency of these scarce resources and improve long-term impact.
AB - Background: Public access automated external defibrillator (AED) deployment and community cardiopulmonary resuscitation (CPR) programs should target geographical areas with high risk of out-of-hospital cardiac arrest (OHCA). Although these long-term, location-based interventions implicitly assume that the geographical OHCA risk remains stable over time, there is a paucity of evidence to support this assumption.Objective: To determine whether geographic OHCA risk is stable over time in a Canadian urban setting.Methods: We identified all atraumatic public-location OHCAs in Toronto, Canada from Jan. 2006 – Dec. 2014 and allocated each of them to one of the 140 neighborhoods defined by the City of Toronto. We then calculated the intra-class correlation (ICC) to measure the relative variability of OHCA counts within and between neighbourhoods over time.Results: We identified 2506 atraumatic public OHCAs. The figure shows that the average number of public OHCAs in Toronto was 278.4 (±41.4) per year. The highest-risk neighborhood had an average number of 12.9 OHCAs per year and remained the highest-risk neighborhood during six of the nine years. The four lowest-risk neighborhoods each had a rate of 0.1 OHCA per year. The ICC value was 0.67 [95% CI, 0.61 to 0.73], indicating that there was less year-to-year variation within the same neighborhood (i.e., more temporal stability) and more variation between neighborhoods.Conclusion: The OHCA rate in Toronto is stable at the neighborhood level over time. High-risk neighborhoods tend to remain high-risk, which supports focusing public health resources in those areas to increase the efficiency of these scarce resources and improve long-term impact.
M3 - Meeting Abstract
VL - 132
JO - Circulation
JF - Circulation
SN - 0009-7322
IS - Suppl. 3
M1 - A15003
ER -