Hot spots for pediatric asthma emergency department visits in Ottawa, Canada

Abstract

Objective

Pediatric asthma emergency department (ED) visits and repeat visits place a substantial burden on healthcare. National and provincial level studies demonstrate geographic variation in asthma ED visits and links to marginalization, but preclude translation into practical targeting of healthcare delivery. It is important to understand the relationship between pediatric asthma ED visits and marginalization at a more granular level. To map the city-level geographic variation in pediatric asthma ED visit and re-visit rates at the Children’s Hospital of Eastern Ontario (CHEO) in Ottawa, Canada and the relationship with marginalization.

Methods

We performed a single center retrospective cohort study of children ages 1–17 with one or more ED visits for asthma at the CHEO in Ottawa. Using postal codes, we linked patients to census tracts. Per census tract, we mapped pediatric asthma ED visit and re-visit rates within one year and identified overlap with the Ontario Marginalization Index.

Results

Of 1,620 children with an index ED visit, 18.5% had a repeat ED visit. We identified 10 hot spot census tracts each for pediatric asthma ED visit and re-visit rates. We identified an overlap between urban hot spots and areas with high ethnic concentration or low dependency.

Conclusion

At a granular, city-wide level, pediatric asthma ED visit and re-visit rates are heterogeneous. Urban hot spots, in contrast to rural, have more overlap with marginalization, especially ethnic concentration. These methods can be used in other jurisdictions to inform practical community strategies for geographically-targeted prevention of pediatric asthma-related ED visits in vulnerable areas.

Abbreviations:
ED:	=	Emergency department;
CHEO:	=	Children’s Hospital of Eastern Ontario;
PRAM:	=	Pediatric Respiratory Assessment Measure;
ON-Marg:	=	Ontario Marginalization Index;
SES:	=	Socioeconomic status;
US:	=	United States

Supplemental data for this article can be accessed at publisher’s website.

Keywords:

• Pediatric asthma
• emergency department visits
• marginalization
• geography
• risk factors

Acknowledgments

Thank you to Richard Webster for support with statistical analyses.

Declaration of interest

The authors have no financial or other competing interests to report.

Funding

There were no additional funding sources for the research reported in the manuscript.