Impact of the 2006 California Heat Wave on Hospitalizations and Emergency Department Visits
Author Information
Author(s): Kim Knowlton, Miriam Rotkin-Ellman, Galatea King, Helene G. Margolis, Daniel Smith, Gina Solomon, Roger Trent, Paul English
Primary Institution: Natural Resources Defense Council
Hypothesis
Did any age or race/ethnicity groups experience increased hospitalizations and emergency department visits during the 2006 California heat wave?
Conclusion
The 2006 California heat wave significantly increased morbidity, particularly among children and the elderly, indicating that population acclimatization and adaptive capacity influenced risk.
Supporting Evidence
- During the heat wave, there were 16,166 excess ED visits and 1,182 excess hospitalizations statewide.
- ED visits for heat-related causes increased significantly, especially in the Central Coast region.
- Children (0–4 years) and the elderly (≥ 65 years) were at the greatest risk for increased morbidity.
- Significant increases in ED visits were observed for acute renal failure, cardiovascular diseases, diabetes, and electrolyte imbalance.
Takeaway
When it got really hot in California in 2006, many more people went to the hospital or emergency rooms, especially kids and older folks.
Methodology
The study aggregated county-level hospitalizations and ED visits for various causes during the heat wave and compared them to a reference period.
Potential Biases
Potential confounding by air pollution could affect the results, particularly for cardiovascular and respiratory morbidities.
Limitations
Data suppression and underreporting issues limited the ability to determine geographic variations in patient demographics.
Participant Demographics
The study included a diverse population of California residents, with specific focus on age and race/ethnicity groups.
Statistical Information
P-Value
p<0.05
Confidence Interval
95% CI, 5.67–7.01
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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