A Lethal Change in the Weather: Temperature Extremes and Premature Mortality
2006
Temperature Extremes and Premature Mortality
Sample size: 7800000
publication
Evidence: high
Author Information
Author(s): Bazilchuk Nancy
Primary Institution: Harvard School of Public Health
Hypothesis
How do extreme temperatures combine with underlying medical conditions to increase mortality risks?
Conclusion
The study identifies specific diseases that increase mortality risks during extreme temperature days.
Supporting Evidence
- More than 160 deaths occurred during California’s July 2006 heat wave.
- The study analyzed approximately 7.8 million death records from 50 U.S. cities.
- Blacks are more likely than whites to die on hot days, especially from cardiovascular disease.
- Elderly and diabetics are more vulnerable to heat when the cause of death is not cardiovascular disease.
- Atrial fibrillation increases vulnerability to heat, a previously unreported finding.
- Cardiovascular deaths showed a greater relative increase on extremely cold days.
Takeaway
Very hot or cold days can be dangerous for certain people, especially those with health problems like heart disease or diabetes.
Methodology
The researchers analyzed death records using a case-only approach to identify factors affecting mortality during extreme temperatures.
Participant Demographics
The study focused on vulnerable populations, including the elderly, lower-income individuals, and those with chronic conditions.
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