Asthma-related Emergency Visits in Children and Air Quality in Washington, DC
Author Information
Author(s): Steven M Babin, Howard S Burkom, Rekha S Holtry, Nathaniel R Tabernero, Lynette D Stokes, John O Davies-Cole, Kerdan DeHaan, Deitra H Lee
Primary Institution: Johns Hopkins University, Applied Physics Laboratory
Hypothesis
What are the associations between pediatric asthma-related emergency department visits and air quality, socio-economic status, and age group?
Conclusion
The study found significant associations between ozone concentrations and asthma-related emergency department visits, particularly in children aged 5–12 years.
Supporting Evidence
- A 0.01-ppm increase in ozone concentration was associated with a 3.2% increase in daily ED visits for children aged 5–12 years.
- The highest rate of asthma-related ED visits was found in the 1–4 year age group, but significant ozone associations were not observed in this group.
- Children living in high poverty zip codes had a higher relative risk of asthma-related ED visits and admissions.
Takeaway
When the air has more ozone, kids aged 5 to 12 are more likely to go to the hospital for asthma. Kids living in poorer areas are also more likely to have asthma problems.
Methodology
The study used Poisson regression analysis on daily counts of pediatric asthma-related emergency department visits and environmental data from 2001 to 2004.
Potential Biases
Potential biases may arise from the ecological nature of the study, as individual exposures and socio-economic variations within zip codes were not accounted for.
Limitations
The study was limited to a contextual analysis at the zip code level and did not include individual-level data on exposure or health outcomes.
Participant Demographics
The study focused on pediatric patients aged 1 to 17 years in Washington, DC.
Statistical Information
P-Value
0.000
Confidence Interval
95% CI = 1.4–5.0 for ED visits; 95% CI = 0.6–8.5 for admissions
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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