The effect of temperature on hospital admissions in nine California counties
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This study examined the association between mean daily apparent temperature and hospital admissions for several diseases in nine California counties from May to September, 1999 to 2005.
We conducted a time-stratified case-crossover study limited to cases with residential zip codes located within 10 km of a temperature monitor. County-specific estimates were combined, using a random effects meta-analysis. The analyses also considered the effects of ozone and particulate matter (PM2.5).
We found that a 10°F increase in mean apparent temperature was associated with a 3.5% [95% confidence interval (CI) 1.5–5.6] increase in ischemic stroke and increases in several other disease-specific outcomes including all respiratory diseases (2.0%, 95% CI 0.7–3.2), pneumonia (3.7%, 95% CI 1.7–3.7), dehydration (10.8%, 95% CI 8.3–13.6), diabetes (3.1%, 95% CI 0.4–5.9), and acute renal failure (7.4%, 95% CI 4.0–10.9). There was little evidence that the temperature effects we found were due to confounding by either PM2.5 or ozone.
Our results indicate that increases in ambient temperature have important public health impacts on morbidity.
- The effect of temperature on hospital admissions in nine California counties
International Journal of Public Health
Volume 55, Issue 2 , pp 113-121
- Cover Date
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- Online ISSN
- SP Birkhäuser Verlag Basel
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- Hospital admissions
- Industry Sectors
- Author Affiliations
- 1. Office of Environmental Health Hazard Assessment, California Environmental Protection Agency, 1515 Clay Street, 16th Floor, Oakland, CA, 94612, USA
- 2. Infectious Disease Branch, California Department of Public Health, Richmond, CA, USA